. Injurious and useful insects; an introduction to the study of economic entomology. Insects; Beneficial insects; Insect pests. MOUTH-PARTS OF A COCKROACH 13 transparent than before. After soaking in clean water for a minute or two, transfer the pieces to a saucer of water acidulated with hydrochloric, acetic or other acid, say one per cent. Transfer again to clean water. The object of this thorough washing is to remove the alkali, which is apt to cling to the prepara- tions. Then pass through methylated alcohol and ab- solute alcohol, using watch- glasses or other vessels of small size, for t
Image details
Contributor:
Central Historic Books / Alamy Stock PhotoImage ID:
PG4AGMFile size:
7.1 MB (246.7 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
1147 x 2178 px | 19.4 x 36.9 cm | 7.6 x 14.5 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. Injurious and useful insects; an introduction to the study of economic entomology. Insects; Beneficial insects; Insect pests. MOUTH-PARTS OF A COCKROACH 13 transparent than before. After soaking in clean water for a minute or two, transfer the pieces to a saucer of water acidulated with hydrochloric, acetic or other acid, say one per cent. Transfer again to clean water. The object of this thorough washing is to remove the alkali, which is apt to cling to the prepara- tions. Then pass through methylated alcohol and ab- solute alcohol, using watch- glasses or other vessels of small size, for the sake of economy. If many pieces are placed in a small quan- tity of absolute alcohol, the liquid should be changed once or even twice; it is necessary to remove the water as completely as pos- sible. Then transfer to a saucer of turpentine. If any appreciable quantity of water is present, the pieces will turn milky, and must be replaced in absolute alcohol. If they look clean and bright, they are ready for mounting. Take a clean micro- scopic slip, and place a small drop of balsam ex- actly in the centre. It is convenient to rule on a card the outline of the slip, and to draw diagonals, whose intersection marks the centre of the slip when it is placed on the card exactly over the ruled outline. If any bubbles appear in the balsam, break them with a hot needle. Take out one of the preparations with a section-lifter, and arrange it neatly on a glass cover. Lower the cover upon the balsam with a needle, so that it gradually takes the horizontal. Fig 12.—Maxilla of the first pair (cockroach). Ca^ cardo ; .S"^, stipes; La-y lacinia ; Ga^ galea ; Pa^ palp. X 20.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Miall, Louis Compton, 1842-. London, G. Bell & sons