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Bookcentury Stock Photos and Images
RMW26XAM–Archive image from page 4 of Cyclopedia of farm crops . Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada cyclopediaoffarm00bailuoft Year: 1922, c1907
RMW236DE–Archive image from page 138 of De dierlijke vijanden der koffiecultuur. De dierlijke vijanden der koffiecultuur op Java dedierlijkevijan02koni Year: 1897 .(<-i1ea.-elin.Vcii imI shaiuls Pl.uit.-iitum , N' XLI' RSosdirinan e: H Rrsman dtl PWMTrapimpr.
RMW23DNM–Archive image from page 157 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22DC2–Archive image from page 11 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911 PRIMEIRA PARTE AS COBRAS EM GERAL AS COBRAS DO Brazil EM PARTICULAR, ESPECIALMENTE AS VENENOSAS 2 3 SciELO 10 11 12 13
RMW22KN1–Archive image from page 23 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW23PX4–Archive image from page 179 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911 Ã-ndice das estampas Modo de capturar as cobras: Entre as pags 16 a 17 Com uma haste metallica, fig. n I Com o laço que o Instituto distribue, Hg. u 2 Presa no laço, fig 3 Sendo introduzida na caixa para transporle, [lg, n. . . I o l)r. Chastinet ensinando a um urupo de operários agrÃ-co- las o modo de capturar e acondicionar uma cobra vene- nosa, para ser enviada ao Instituto, fijr. n. . . . 5 Serpentário do Instituto: Entre as pags lo e 17-fig. o Caracteres dos dente
RMW23R8D–Archive image from page 180 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22W4W–Archive image from page 112 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW23NYN–Archive image from page 177 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911 CAPITULO I Tratamentos supersticiosos e empíricos, paus. . 89 a 93 CAPITULO II Tratamentos chimico-physiologicos, pags. . . . 95 a (>7 CAPITULO II Tratamento especifico ou serumtherapico, pau. . . . 99 Preparo dos seruns anti-peçonhentos, pag. , . . .99 Provas do valor preventivo e curativo, pag. . . . 103 Resultados práticos obtidos, pag [05 Observações clinicas, pags 106 a 127 Como se deve tratar um caso de mordedura de cobra, pag. 128 Blbllographia, pag 133
RMW22M2G–Archive image from page 24 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW23TR5–Archive image from page 184 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW23KN6–Archive image from page 172 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22K7X–Archive image from page 22 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22RCP–Archive image from page 108 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW23DN5–Archive image from page 157 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22GY9–Archive image from page 16 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911 cados anteriormente, o qual apresenta Um pequeno sulco na parte anterior: junto i base d'esse dente ahre-se o canal excrector da glândula de veneno. Este apparêllio imperfeito, inoculador de veneno è destinado a tunccionar no momento da deglutição, porquanto a sua localisação posterior não lhe permitte en- trar em actividade senão quando a cobra engole a victima. Parece que a inoculação de peçonha n'este caso tem efíeito contensivo, além do papel que desempenha como ferment
RMW23FGJ–Archive image from page 161 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911 BIBLIOG RAFHIA
RMW23FY5–Archive image from page 162 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22JPG–Archive image from page 21 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22WWM–Archive image from page 114 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW22J8P–Archive image from page 20 of A defesa contra o ophidismo. A defesa contra o ophidismo defesacontraoop00Braz Year: 1911
RMW23H44–Archive image from page 164 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 iw C.M.S. del. Munidopsis curvirostra.
RMW24HRP–Archive image from page 244 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 Sci. Invest. '21. PI. I. C.M.S. del. Eupagurus Bernhardus.
RMW239J1–Archive image from page 146 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 I. '14. PL VII. C.M.S. del. Nephropsis atlantica.
RMW23JKE–Archive image from page 168 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 C.M.S. del. Figs. 1-4..—Axius stirhynchus. Figs. .5-7. —Calocaris Macandreae. Figs. 8-10.—Callianassa Stebbingi.
RMW23ACX–Archive image from page 148 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 I. '14. PL viii. C.M.S. del. Figs. 1-4, Figs. 5-10. -Uroptychus rubrovittatus. -U. nitidus, var. concolor.
RMW23JMD–Archive image from page 168 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914
RMW23D0T–Archive image from page 154 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 I. 14. PL X. C.M.S. del. Gastroptychus formosus,
RMW23JNM–Archive image from page 168 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914
RMW233GP–Archive image from page 130 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 â â '14. PI. I. >'s, 1-13.âPolycheles typhlops Figs. 14. 15.âP. nanus, var. Grimaldii.
RMW23JN5–Archive image from page 168 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 PI. XIV.
RMW23833–Archive image from page 142 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 PI. V. Figs. 1, 2.-Eryonicus hibernicus. Figs. 3-8.-E. Kempi. Figs. 9-12.-E. Scharffi
RMW2353C–Archive image from page 134 of Decapoda reptantia of the coasts. Decapoda reptantia of the coasts of Ireland decapodareptanti00selb Year: 1914 I. '14 PI. III. C.M.S. del. Polycheles granulatus.
RMW22HPJ–Archive image from page 18 of Das forstliche Weiserprozent (1889). Das forstliche Weiserprozent dasforstlichewei00boseuoft Year: 1889 Ârtragstafcl lU. 11 s I o »=4 o o â v2 vO S-» <3 - iD iO 0 ft (N 30 CO ;C so X lo' (m' ec co' o' 3' 1 c' «r x' -o' cT to'-t' â c â i: > - oo' ai' S Tti'-' ro' CO' (m'' cn c'ocT (m' i-Tr-T W â :r; 30 â' - iâ 'f c: x - o 0 c: x'' c'' ctT ''o'o' oT ci' »o cC'oS' (m'' »-'' u5ooioi:t>-c-xcoGoa>aiC5ai lO t-in o »o c⢠co cc vo N''flo' i> o' -o o'o'in' ic'io'io iri'id' lo' ' C -' - » -' T | iq O -r â¢> cn; 'S Ti
RMW24JXA–Archive image from page 247 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 242 THE dairyman's MANUAL. der and may then be used for many useful purposes, or be added to the garden compost heap. AYhere the cellar cannot be used on account of the wetness of the soil, an above-ground cellar must be pro- vided. This may be partly sunk in the ground, but if there is any danger of water soaking into it, it should be wholly above the ground. It becomes then, properly, a milk-house, and the description of such a house
RMW233TG–Archive image from page 131 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 ii5 CYTOLOGY chap. intact to one pole, so that in anaphase I. there are three chromosomes /
RMW22K8K–Archive image from page 22 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 MITOSIS somes, each of which subsequently divides into two daughter chromosomes. The original series of chromosomes is thereby duplicated into two exactly â »>
RMW245G5–Archive image from page 207 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 'PT:
RMW238TH–Archive image from page 144 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 TAF.II. Ficj. 7. - a) tief orangegelb, b) glänzend kohlschwarz, c) dunkel teegrau, . d) grünlich goldfarbig, RchiU lernd wie bei den Staaren, e) schneewciss, 1) ganz schwarzbraun, g) kohlschwarz, wie die Bruat, ii) goldge
RMW22XKY–Archive image from page 116 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 I : • Y lt H i • X
RMW22PEJ–Archive image from page 105 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920
RMW2312D–Archive image from page 122 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 DAIRY BUILDINGS. 117 mortised and pinned at the top to plates upon whicli rafters are laid, and where necessary girders are spiked to the posts. A feed trough is fastened to each inner row of posts, and a hay rack is fixed above each trough ; the passage between the rows of posts is used for the purpose of drawing fodder in a cart or wagon. The spaces be- tween the inner posts form roomy stalls for the cattle, if desired, and if cows ar
RMW24C9T–Archive image from page 228 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 VII MEIOTIC PHASE IN PLANTS 213 At fertilization the two male gamete nuclei which are formed in each pollen grain are both introduced into the embryo-sac ; one fuses with the ovum nucleus to produce the zygote, while the other fuses Ns-ith the central fusion nucleus, forming thus a triploid nucleus. This afterwards gives rise to the endosperm, or reserve food material of the seed. For a more detailed account of the gametophytc and fert
RMW22YRK–Archive image from page 119 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 First division reductional. Second division equational. (3) Various forms of the X and Y Chromosomes A frequent feature of the X chromosome is that it is compound,
RMW22NRH–Archive image from page 103 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 88 CYTOLOGY CHAP. centres in the details of the meiosis, as we may call it, though it does not result in a reduction of the chromosome number. , A puzzling feature about the changes undergone by the nucleus in preparation for the single maturation division is their extraordinary similarity to the typical phases of a true meiosis resulting in chromosome reduction. The definitive chromosomes of the single maturation division are also str
RMW23BC8–Archive image from page 150 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 TAF.V. Fig. 10. a) goldgelb wie beim schönsten Kanarieiihahii, b) tiefbroiiccgelb, c) glängend schwarz, d) glänzend griin, e) griinbraun und schwarzge- sprentelt, f) dunkelgrün, x) dunkelbraun, g) d. Schwanz glänzend schwarz
RMW230R3–Archive image from page 121 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 116 THE DAIRYMAN S MANUAL. stalls, five by ten feet, and a loose box for a cow seven and a half by ten feet, with a passage, in wbicli is a feed bin, room for a fodder cutter and feed box, and stairs to the hay loft. Over the feed box is a hay shute from the loft above. The poultry-house adjoins the passage, from which t>vo doors open into it. This house is eighteen by twelve feet, and has a sloping front of glazed sash. The Poj PICS
RMW22WXD–Archive image from page 113 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 108 THE DAIBYMA2?'S MANUAL. built on the following plan (figure 11), which shows a complete arrangement, enclosing a square yard, and which will be isolated from other buildings. It consists of thirty-three loose stalls for cows and eight pens for calves and bull, in the front, on each side of the entrance gate. Each stall is six by eight feet, and separated by boarded partitions four feet high. The shed is nine feet high in the front,
RMW22XNH–Archive image from page 116 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 B I : • Y lt H i • X
RMW233W8–Archive image from page 131 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920
RMW247GR–Archive image from page 213 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 198 CYTOLOGY CHAP. (1912) himself found that in sea-urchins the chondriosome apparatus introduced by the spermatozoon undergoes no metamorphosis, but is relegated unchanged to one of the first two blastomeres. An exactly similar process has been described for various mammals by van der Stricht (1910) in the bat, and by Lams (1913) in the guinea-pig (Fig. 82). In order to save the theory of chondriosome inheritance, it was suggested tha
RMW22PE3–Archive image from page 105 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920
RMW243KX–Archive image from page 201 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 196 THE dairyman's manual. lostrum the epithelial cells have not undergone this de- structive change, the walls are still intact and contain their oil granules, and thus constitute the corpuscles of this fluid. In the colostrum albumen takes the place of caseine in the perfect milk, but a reverse change is slowly made and completed about the fourth day. At the end of lactation, when the animal is again pregnant, the milk again loses its
RMW22YPW–Archive image from page 119 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 (3) Various forms of the X and Y Chromosomes A frequent feature of the X chromosome is that it is compound, ife-
RMW230DG–Archive image from page 120 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 DAIRY BCILDIKGS. 115 floor will be sufiBcienfc, and forty dollars will be amply sufficient to supply a family cow with every comfort and convenience. The floor should be of cement or brick, or of hard-rammed clay. Wood is the least desirable floor. A cement floor is the best, and if well made it is vermin- proof. It should be made of one part of Rosendale cement and three parts clean sand, mixed dry and then with water into a thin morta
RMW22JXP–Archive image from page 21 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 B / mn Fig. 2. H Diagram of Mitosis. The nucleus contains six chromosomes. A, resting nucleus ; B, early prophase, individual chromosomes not yet distinguishable, centrosome dividing; C, middle prophase, appearance of spindle figure ; D, late prophase. The nuclear membrane has disappeared and the chromosomes are becoming attached to the spindle fibres. E, metaphase; F, anaphase ; G, telophase ; H, nuclear and cell division complete,
RMW249K5–Archive image from page 220 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 VII MITOSIS IX PROTISTA 205 the chromatin granules in Hnear scries had the same function as postu- lated for the chromosomes of a Metazoan mitosis, namely, to rffrrt ib. jr accurate division and partition among the daughter nuclei. In some Protista very well-developed mitosis, closely rcsenibhng that in the Metazoa and Metaphyta, is found (Fig. 85). In the Coccidian, Aggregata eherthi (Dobcll and Jameson, 1915) the nuclei of the primar
RMW22TR6–Archive image from page 111 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 96 CYTOLOGY chap. already haploid. In such eggs, if caused to develop parthenogenetically, the haploid egg nucleus acts in cleavage exactly like the zygote nucleus in a fertilized egg. The resulting embryo is in consequence haploid, as has been demonstrated by many observers, though originally Delage erroneously supposed that the diploid number was restored by an act of auto-regulation (Wilson, Toxopnetistes, igoi; Hindle, Strongylocen
RMW23D3R–Archive image from page 154 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 Fig. U. a) tief broncegelb oder tief orange- gelb, b) glänzend schwarz, c) goldgelb wie der reinate Kana- rienvogel, x) feegrau, d) zimmetbraun und ins grünliche schillernd. e) goldgelb. TAF.VII. f) pechschwarz wie beim S
RMW22X8H–Archive image from page 114 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 Fig. 13. Fig. 13.—SECTION OF CHEAP BARN AND STABLES. at figure 12. At figure 13 is a section of a cheap barn and stables connected. The building may even be brought lower at the eaves, and provide jiens for pigs and calves, or sheep, or open sheds for tools, etc. In this way it is protected from sweeping winds, which can have but little effect upon it. The central space is used for storing hay or grain, or for threshing, and the side
RMW24KC1–Archive image from page 1066 of Verslagen en mededeelingen. Verslagen en mededeelingen d7d8verslagenenm03akad Year: ( 465 ) arniige kunnen als bacteroiden beschouwd worden, wier ver- takking verder is voortgegaan dan gewoonlijk. Daar een nauwkeurig onderzoek leert, dat bet centrum, vanwaar de stralen ontspringen, niet een enkel punt is, maar zjkere af- meting beeft, is bet waarscbijnlijk, dat elke nieuwe tak aan den voet van een pas gevormden ontspringt, en, dat niet vele gemeenscbappeliik uit een enkele bacterie ontstaan. Zwermers, sterreu eu bacteroideu iu vloeibare cult.ureii vau Baci
RMW24B53–Archive image from page 224 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 Fig. 26—A DAIRY PAIL. Fig. 27.—MILKING PAIL. of milking is as follows. The cows should be kept in a contented and quiet condition during the milking. Pre- viously, they should have been thoroughly cleaned by carding and brushing, and the stable floor should be made clean for the milkers. The milkers should be clean and their clothes free from dust. A quick brush with a broom-corn whisk will quickly remove any adhering matter from th.e c
RMW233TF–Archive image from page 131 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 / B
RMW22K77–Archive image from page 22 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 ''. ' . B
RMW23C6D–Archive image from page 152 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 TAF.VI. a) tief orangegelb, b) schneeweiss, c) glänzend schwarz, (I) feegrau, e) ilunkelgran, f) zimmetbraim, ) Stieglitzbraun, li) giün, i) zimmetbraun, k) glänzend schwarz. I) dei Schwanz desgleichen.
RMW249BD–Archive image from page 219 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 fCS .r- 4 '' it # H ⢠'.. â i â¢-â¢v- :-. tt 'â i ...3&' K Fig. 84. Nuclear division in the asexual cycle of Coccidtum schubergi. (After Schaudinn, Z.J.A., 1900.) A-E, the schizont; F-L, the oocyst. the first few divisions of the zygote nucleus after syngamy, are instructive as showing how nuclei which appear to divide in the most purely amitotic fashion may have undergone a previous reorganization which is presum- ably connected
RMW22RF1–Archive image from page 108 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 in PARTHENOGENESIS 93 bee is puzzling, and docs not appear to have any significant connection â â 'â .'''i-A) y H Fig. 43. The meiotic phase in the drone of the honey-bee {Apis viellifica). (After Meves, A.ui A., 1907.) A. primary spermatocyte; B, prophase I.; C, abortive metaphase I.; D, E, degeneration of the uutotic figure beginnins? of cell division; F, prophase II. The cell has completed its division uito a larger nucleated and
RMW22K8P–Archive image from page 22 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 /
RMW23A9H–Archive image from page 148 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 Fig. 63. FertiUzation of the egg of Ascaris tmgalocephala bivalens by spermatozoa of A. m. MnlV<l;•ns (After Herla A.B., 1895.) A, approach of the gamete nuclei; B, the chromosomes of the zygote nucleus; C, egg divided into two blastomeres ; D, twelve blastomeres. and Doncaster, 1914) the large chromosomes of Lycia and the smaU ones of Ithysia are distinguishable in the hybrid right up to the formation of its gametes (Fig. 185). The
RMW231YP–Archive image from page 125 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 120 THE DAIRYMAN'S MANUAL, Where the hight of the hillside was too great to permit of the use of a common suction pump, a dry well was dug to a sufficient depth, viz., eight feet, and the pipe was carried to the bottom of it and connected with a force pump, so that the water could be carried, by means of a hose, to any part of the yard or stables (see figure 19). A nozzle attached to this hose made it easy to throw a stream of water ove
RMW23AGA–Archive image from page 148 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 Fig. 8. a) tiefbroucL'gelb oder tieforau- Kt'gelb, b) gläiizt'iid schwarz, c) goldgelb, wie der reinste Kanarienvogel, x) feegrau, d) ziinmetbraun, e)dunkelbraun, wie beim Stieg- litz. t) goldgrün, g) die Schwingenspitze glä
RMW23AAR–Archive image from page 148 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 B
RMW24E6Y–Archive image from page 232 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 MILKING AKD MILKING APPARATUS. 227 the end of the teat and rubbing it a minute ; this will dissolve the scale and cause its removal. Kicking cows make serious trouble in a dairy, but a good cow should never be discarded on this account, for the trouble may be cured. Kindness and patience, by which the confidence and affection of the cow are secured, often effect Fig. 30.—TIE FOR KICKING COW. a permanent cure in cases where the fault
RMW2305B–Archive image from page 120 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 Y
RMW23879–Archive image from page 142 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 Tw.3. Wie die Kanarienvögel das Kreuzkraut etc. verzehren.
RMW22JTJ–Archive image from page 21 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 X B
RMW24BD4–Archive image from page 226 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 VII POLYPLOID NUCLEI IN PROTISTA 211 Nuclear multiplication in A ulacanlha. (Borgert. Z.J.A., looi, and .-1 .P.K.. 1909.) A-C, stages m the division of the primary nucleus during binary fission of the animal ; DC prchmmary stage's in gamete (ormatitMi. A, resting nucleus ; B, mitosis, equatorial plate ; C. portion ot .111 anaphase shown on a larspr sc air ; U, formation of secondary nuclei (the little dark specks in the cytoplasm)
RMW22XNK–Archive image from page 116 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 B
RMW23365–Archive image from page 129 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 114 CYTOLOGY chap. (primary oocytes) which will give rise to eggs are indistinguishable from (B ';).,' m. -0 / I â¢m} ⢠- 0 -t: -..) - -5 v:, v ⢠/ /®V â 'â¢/ J' ' fj f> â .-( o 'tX
RMW238XE–Archive image from page 144 of Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel,. Die Kanarienvögel, Sprosser, Nachtigallen, Rothgimpel, Schwarzamseln, Bluthänflinge, Steindrosseln und Kalanderammerlerchen, sowie ihre Wartung, Pflege und Fortpflanzung : nebst einer Anleitung, sie zu fangen, ihre Krankheiten au erkennen und zu heilen cytologischestud00taha Year: 1863 Ficj. 7. - a) tief orangegelb, b) glänzend kohlschwarz, c) dunkel teegrau, . d) grünlich goldfarbig, RchiU lernd wie bei den Staaren, e) schneewciss, 1) ganz schwarzbraun, g) kohlschwarz, wie die Bruat, ii) goldgelbe Streife
RMW2332D–Archive image from page 128 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 WATER SUPPLY. 123 may be put on above it, until the whole is completed. In digging, a shoulder a foot in width is made on the top of the sub-soil eighteen inches deep, to rest the beams upon. This is also covered with cemfent, and the beams are laid on, and the spaces between them on the shoulder are filled in with stone, or brick, and cement, to the upper level, upon which the floor rests. A strong floor of four-mch plank, doubled, wit
RMW22YR8–Archive image from page 119 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 104 CYTOLOGY CHAP. The two different ways of obtaining the same end result—the pro- duction of the two types of spermatozoa in equal numbers—may be represented in a diagram as follows : Spermatocyte I. Spermatocyte II. Spermatid. First division equational. Second division reductional. First division reductional. Second division equational.
RMW2305G–Archive image from page 120 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 Y •••• H ' I V Fig. 49. I The chromosomes of Syromastes (A, B) and Acholla multispinosa (C-I). (Wilson, B.B., 1909 a, and Payne, fi..,1910.) In A and B the X chromosomes are blackened. A, (5 diploid group, 20 fXo = 22 chromosomes; B, ? diploid group, 20 + 2X2 = 24 chromosomes : C, 9 diploid group, 20+2X = 30 chromosomes. The three pairs of small X elements are easily seen, the other two pairs are not at this stage distinguishable
RMW23B00–Archive image from page 150 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 V CHROMOMERES 135 64, A, D) and between the conjugating chromosomes in the meiotic prophase (Figs. 64, C, and 66) is very striking. The latter phenomenon is specially significant, suggesting that syndesis does not concern the chromosomes as wholes, but that it takes place between the separate elements of which they are composed. The thesis formulated at the beginning of this chapter requires that the chromosomes should not merely be co
RMW22PG2–Archive image from page 105 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920
RMW24K55–Archive image from page 1022 of Verslagen en mededeelingen. Verslagen en mededeelingen d7d8verslagenenm03akad Year: ( 421 ) diger van concaaf in convex. De loop der kromme is voor- gesteld in Pig. 3. jr=/ Zij begint rakende aan de rechte lijn, die het boven uit- einde van pi vereenigt met het punt =1, welke rechte lijn zelve de druklijn zyn zou als a= O is. Beschouwt men niet den druk zelf, maar de drukvermin- dering, dan zou de bekende regel voor de drukverlaging Pi—P voeren tot 1. p-x Uit de figuur ziet men dat deze uitdrukking voor uiterste verdunning wel aan de eenheid gelijk is, maa
RMW24A5N–Archive image from page 222 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 VII CHROMIDIA IN PROTISTA 207 Another example of multiplication of nuclei by chromidia fonnatiou alternating with multiplication by mitotic division, though attended by more complications, is afforded by Arcclla (Fig. 88), the life history of <H 0)
RMW22TN8–Archive image from page 111 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 B Fig. 44. Artificial parthenogenesis in Asterias. (Buchner, A.Z., 1911.) A, telophase of second maturation division. The second polar body nucleus, instead of being thrust out of the egg, remains close to the egg nucleus. B, the egg and second polar body nuclei have come into contact. Achromatic figure developing. C, the two nuclei have fused. p.b.I., first polar body. two polar bodies, as if they had been properly fertilized. The hap
RMW24K48–Archive image from page 1037 of Verslagen en mededeelingen. Verslagen en mededeelingen d7d8verslagenenm03akad Year: ( 436 ) worden, ten minste als ook deze waarde vau x nog klein genoeg is om ö''''' =1 — ax te mogen stellen : (1 - mrf =C{a — 2) (1 - 2.x) Een wortel dezer vergelijking is gelijk aan ,v = 0,018 wat met de getallen van Tamman vrij goed sluit. De andere wortel ligt te vèr weg om als benaderingswaarde te kunnen gelden voor de plaats waar later K weder 2 is, na zijn maximumwaarde. Binnen dat kleine interval dus, van x =z O tot X =z 0,018 is, bij SO4H2, de complicatie ten einde ge-
RMW237MX–Archive image from page 142 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 n V HOMOLOGOUS CHROMOSOMES 127 As they condense for metaphase the homologues become more distinct from one another but still remain very closely paired (Fig. 56, B, G, I). In some strains they remain indistinguishably fused even at this stage (Taylor, 1915 a). In anaphase they again come into close apphcation or fusion (Fig. 56, E, J). It is interesting to note that in Taylor's material (1915 a, 1917), although, in general, fusion of t
RMW24E76–Archive image from page 232 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 Fig. 30.—TIE FOR KICKING COW. a permanent cure in cases where the fault has been pro- duced by cruelty and bad management. Sometimes kind- ness is not effective, as where a cow is suffering from sore teats, when she cannot be blamed for kicking. Then it is necessary to tie the leg in.a very simple manner. It is done by the use of a fastening common in Irish and Scotch dairies, and known as a spancel. It consists of a loop of cord about
RMW249CR–Archive image from page 219 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 t
RMW23A66–Archive image from page 148 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 CONTINUITY OF THE CHROMOSOMES 133 The grouping of the chromosomes derived from the male and female parents which is to be seen in the first few cleavage divisions is of course an example of gonomery, such as occurs in Cyclops, etc. (Fig. 35), and, as usual, disappears in later cleavages. The important fact is that the two types of chromosomes introduced by the two parents, though mingled together, are recognizable in all mitoses. From
RMW22XME–Archive image from page 116 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 K L The chromosomes of Lygaeus turcicus. (After Wilson, J.E.Z., 1905 and 1912.) ., spcrmatcjonial telophase ; B, later telophase ; C, emergence of the massive chromatic bodies in the primary spermatocyte; D, leptotene stage; E, ' confused stage '; V, evolution of the bivalents ; G.metaphase I.; H, I, daughter chromosome groups of anaphase I.; J, metaphase II., X and Y, now paired to form a bivalent; K, L, d.Tui;htcr chromosome groups
RMW22T53–Archive image from page 109 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 104 THE DAIRYMAN'S MANTAL. manner, it should be double and laid with a gutter in it. The planks are necessarily laid crossing the beams, but to prevent drip into the cellar, and to save all the liquid, the planks should be laid double, with the joints broken. To make the floor in the very best manner, and quite water-tight and most durable, the first one should be well coated with hot tar, and the upper planks laid in this, getting the
RMW22KN4–Archive image from page 23 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920
RMW24FHD–Archive image from page 237 of The dairyman's manual; a practical. The dairyman's manual; a practical treatise on the dairy dairymansmanualp00stew Year: 1888 232 THE DAUiYMAVS MANUAL. Chapter XV. as a constant threatening danger in the dairy, and is to be most carefully avoided. When the milk has been strained in the stable and be- fore it leaves there, it is carried to the milk-house for setting for cream. The method of setting varies accord- ing to the system practiced. By the use of the centrif- ugal cream separator, and the immediate use of the Fig. 33.—THE ' CENTRIFUGAL CREAMER.' ski
RMW245FT–Archive image from page 207 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 Fig. 81. ' Illustrating the supposed emission of chromidia from various Metazoan cells. A, B, C, oocyte of Aricia foetida (alter Schaxel, Z.J.A., 1912). A, young oocyte, chromosomes still filamentar, cytoplasm destitute of chromidia ; B, older oocyte, still no chromidia in the cytoplasm ; C, still older oocyte, showing emission of chromidia from the nucleus into the cytoplasm. D, oocyte of Antedon bifida (after Chubb, Phil. Trans., 190
RMW22JY2–Archive image from page 21 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 X
RMW22PEG–Archive image from page 105 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 90 CYTOLOGY CHAP. Doncaster (1907) for the parthenogenetic eggs of the saw-fly, Nematus ribesii, and later by Schleip (1910) for Rhodites rosae, a gall-fly. A very peculiar phenomenon observed by Brauer (1894) in Artemia also falls into this category. As we have already seen (p. 89), the normal procedure is for only one maturation division to take place, without
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