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Computations Cut Out Stock Images

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. English: A Sketch or View of the Company [Rose and Crown Club] as are Together when they Celebrate there Kalendae or Mounthly Computations. Original sketch is in red chalk. circa 1724. George Vertue 1231 Vertue Rose and Crown sketch Stock Photo

RMMNY57M–. English: A Sketch or View of the Company [Rose and Crown Club] as are Together when they Celebrate there Kalendae or Mounthly Computations. Original sketch is in red chalk. circa 1724. George Vertue 1231 Vertue Rose and Crown sketch

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Leonhard Euler, Swiss Mathematician Stock Photo

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Compressed air; theory and computations . ricity, norflood and foul the premises as with water. Hence the user is apt -to tolerate wastes of compressed air that should be checked tosave the coal pile. In some lines of industry compressed air is supreme, in otherselectricity, and still in others steam, and water, each being speciallyadapted to do certain things better than any other, but in somelines the winner has not been decided, or even though decided inso far as present methods apply there may, any day, arise freshcompetition by the invention of new devices or processes. COMPRESSED AIR CHA Stock Photo

RM2AKJEJA–Compressed air; theory and computations . ricity, norflood and foul the premises as with water. Hence the user is apt -to tolerate wastes of compressed air that should be checked tosave the coal pile. In some lines of industry compressed air is supreme, in otherselectricity, and still in others steam, and water, each being speciallyadapted to do certain things better than any other, but in somelines the winner has not been decided, or even though decided inso far as present methods apply there may, any day, arise freshcompetition by the invention of new devices or processes. COMPRESSED AIR CHA

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The Undulatory Theory qf Light. Steam Economy Computations. Fast and Slow Grinding. I 0 4. GAUGES., scientific american, 1877-06-16 Stock Photo

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Numeric Data line icons collection. Statistics, Quantitative, Analytics, Digits, Metrics, Precision, Analysis vector and linear illustration Stock Vector

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Compressed air; theory and computations . ank is emptied the other willbe filled, at which time the switch will automatically reverse theoperation. The economic advantage of the system lies in the fact that theexpansive energy in the air is not lost as in the ordinary dis-placement pump (Art. 37). The compressor takes in air at vary-ing degrees of compression while it is exhausting the tank. The mathematical theory, and derivation of formulas forproportioning this style of pump are quite complicated butinteresting. 70 COMPRESSED AIR Preliminary to a mathematical study for proportioning theinst Stock Photo

RM2AKJARA–Compressed air; theory and computations . ank is emptied the other willbe filled, at which time the switch will automatically reverse theoperation. The economic advantage of the system lies in the fact that theexpansive energy in the air is not lost as in the ordinary dis-placement pump (Art. 37). The compressor takes in air at vary-ing degrees of compression while it is exhausting the tank. The mathematical theory, and derivation of formulas forproportioning this style of pump are quite complicated butinteresting. 70 COMPRESSED AIR Preliminary to a mathematical study for proportioning theinst

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STEAM ENGINE INDICATOR WEITMYER PATENT FURNACE. BOILERS OF EVERY DESCRIPTION. COMPTOMETER Saves 40 per cent. of time. Entire relief from mental strain Adapted to all commercial and scientific computations. Send for circular., scientific american, 1890-03-22 Stock Photo

RM2ABX5XK–STEAM ENGINE INDICATOR WEITMYER PATENT FURNACE. BOILERS OF EVERY DESCRIPTION. COMPTOMETER Saves 40 per cent. of time. Entire relief from mental strain Adapted to all commercial and scientific computations. Send for circular., scientific american, 1890-03-22

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A calculator is located on a white background. Symbolic photo for cost, revenue and profit. Stock Photo

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Compressed air; theory and computations . e,and certainly additional air could betaken in with the water. Art. 33. Hydraulic Air Compressors.—Entanglement Type.—A few compressorsof this type have been built compara-tively recently and have proven remark-ably successful as regards efficiency andeconomy of operation, but they arelimited to localities where a waterfall isavailable, and the first cost of installa-tion is high. The principle involved is simply thereverse of the air-lift pump, and what.theory can be applied will be found inArt. 39 on air-lift pumps. Figure 11 illustrates the element Stock Photo

RM2AKJBD9–Compressed air; theory and computations . e,and certainly additional air could betaken in with the water. Art. 33. Hydraulic Air Compressors.—Entanglement Type.—A few compressorsof this type have been built compara-tively recently and have proven remark-ably successful as regards efficiency andeconomy of operation, but they arelimited to localities where a waterfall isavailable, and the first cost of installa-tion is high. The principle involved is simply thereverse of the air-lift pump, and what.theory can be applied will be found inArt. 39 on air-lift pumps. Figure 11 illustrates the element

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ASTRONOMICAL NOTES. OBSERVATORY OF VASSAR COLLEGE. For the computations of the following notes (which are approximate only) and for most of the observations I am ndebted to students. M.M. Positions of Planets for April 1874. Mercury. This planet which was so beautiful in the evening twi ght in March rises in April before the sun and should be ooked for in the morning. Its declination is so much far her south than in March that it cannot be so well seen. On the 1st of April Mercury rises about 5 A. M. and sets at 4h. 31m. P. M. On the 30th Mercury rises at 4h. Venus. On the 1st of April Venus Stock Photo

RM2ABWBJM–ASTRONOMICAL NOTES. OBSERVATORY OF VASSAR COLLEGE. For the computations of the following notes (which are approximate only) and for most of the observations I am ndebted to students. M.M. Positions of Planets for April 1874. Mercury. This planet which was so beautiful in the evening twi ght in March rises in April before the sun and should be ooked for in the morning. Its declination is so much far her south than in March that it cannot be so well seen. On the 1st of April Mercury rises about 5 A. M. and sets at 4h. 31m. P. M. On the 30th Mercury rises at 4h. Venus. On the 1st of April Venus

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Compressed air; theory and computations . (I) is completely satisfied—that is—given any two of x, y and z the third will be found on the lineCD laid over the two given. Note that the line AE is unnecessary—it being placed in thefigure for demonstration only. Note also that the line FG is notto appear on the chart and that the factor C effects only the widthof the chart and may be taken to suit convenience. Evidently this solution applies only to the special case whenn — m + r. It has the further objection that if the corre-sponding numerical values of x, y and z are very different thenthe leng Stock Photo

RM2AKJ6NP–Compressed air; theory and computations . (I) is completely satisfied—that is—given any two of x, y and z the third will be found on the lineCD laid over the two given. Note that the line AE is unnecessary—it being placed in thefigure for demonstration only. Note also that the line FG is notto appear on the chart and that the factor C effects only the widthof the chart and may be taken to suit convenience. Evidently this solution applies only to the special case whenn — m + r. It has the further objection that if the corre-sponding numerical values of x, y and z are very different thenthe leng

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RM2ABWBY7–ASTRONOMICAL NOTES. OBSERVATORY OF VASSAR COLLEGE. For the computations of the following notes (which are approximate only) and for most of the observations I am indebted to students. M.M. Positions of Planets for June 1874. Mercury. On the 1st of June Mercury rises at 5 in the morning and sets at 8h. 15m. in the evening. On the 30th Mercury rises at 6h. 40m. A. M. and sets at 9h. 2m. P. M. This planet should therefore be seen after sunset during the latter part of June. Venus. On the 1st of June Venus rises at 6h. 8m. A. M. and sets at 9h. 22m. P. M. On the 30p Venus rises at 7h. 9m. A.M. and

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Compressed air; theory and computations . 0 cu. ft. per second toR = 2 is 198. Therefore, the work efficiency is 58 per cent. When pressure is low, as in Ex. 2, the estimated efficiencies willbe materially effected by the atmospheric pressure and the pres- 110 COMPRESSED AIR sure developed should be determined by a water or mercurycolumn; otherwise only rough approximations will be obtained. Art. 57. Suggestions.—The following considerations point tothe conclusion that best results will be gotten from centrifugal aircompressors when the air is held in the machine until every par-ticle is under Stock Photo

RM2AKJ78N–Compressed air; theory and computations . 0 cu. ft. per second toR = 2 is 198. Therefore, the work efficiency is 58 per cent. When pressure is low, as in Ex. 2, the estimated efficiencies willbe materially effected by the atmospheric pressure and the pres- 110 COMPRESSED AIR sure developed should be determined by a water or mercurycolumn; otherwise only rough approximations will be obtained. Art. 57. Suggestions.—The following considerations point tothe conclusion that best results will be gotten from centrifugal aircompressors when the air is held in the machine until every par-ticle is under

RM2ABWBT8–ASTRONOMICAL NOTES. OBSERVATORY OF VASSAR COLLEGE. For the computations of the following notes (which are approximate only) and for most of the observations I am indebted to students. M.M. Positions of Planets for May 1874. Mercury. Mercury rises on the 1st a little after 4 A. M. and sets a little before 5 P. M. On the 31st it rises about 5 A. M and sets near 8 in the evening. In the first week of May it should be looked for before 15th and 29th. Venus. Venus rises on the 1st at 5h. 50m. A. M. and sets at 8h. 20m. P. M. On the 31st Venus rises at 6h. 7m. A. M. and sets at 9h. 21m. P. M. On the

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Compressed air; theory and computations . n atboth ends, and that a particle of matter starts from a state, V,relative to the tube, and moves out, without change of pressure,from radius rx to r, in obedience to the laws of centrifugal force(or acceleration). Its radial acceleration, when distant x fromthe center, is, by well-known laws of mechanics: Acceleration ux2 dVxx dt Also Vx = ^.x dt Therefore, by eliminating dt, we get VxdVx = ^^x but, as before, XUx = - U r (sub x indicating the conditions at the distance x from the cen-ter). Therefore, uVxdVx = -j ocdx. FANS 95 Integrating between Stock Photo

RM2AKJ7TP–Compressed air; theory and computations . n atboth ends, and that a particle of matter starts from a state, V,relative to the tube, and moves out, without change of pressure,from radius rx to r, in obedience to the laws of centrifugal force(or acceleration). Its radial acceleration, when distant x fromthe center, is, by well-known laws of mechanics: Acceleration ux2 dVxx dt Also Vx = ^.x dt Therefore, by eliminating dt, we get VxdVx = ^^x but, as before, XUx = - U r (sub x indicating the conditions at the distance x from the cen-ter). Therefore, uVxdVx = -j ocdx. FANS 95 Integrating between

HOBOKEN MAP OF THE DELAWARE AND LACKAWANNA RAILROAD'S NEW WORKS. month. The French Exhibition. le 4 Winding Spiral Springs. gles. This can generally be done by placing the end in the .0 4 410 Steam Economy Computations. The Water Consumption of Steam Engines. CITY, scientific american, 1877-05-26 Stock Photo

RM2ABWG15–HOBOKEN MAP OF THE DELAWARE AND LACKAWANNA RAILROAD'S NEW WORKS. month. The French Exhibition. le 4 Winding Spiral Springs. gles. This can generally be done by placing the end in the .0 4 410 Steam Economy Computations. The Water Consumption of Steam Engines. CITY, scientific american, 1877-05-26

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Compressed air; theory and computations . (say the y fine) will never be needed; the chart maybe set out as suggested in Fig. 30 and only that portion above BHretained on the finished chart. Thus the scale may be enlargedand accuracy increased thereby. 178 COMPRESSED AIR Evidently the essential proportions of Fig. 27 are not changedby putting the chart in the shape of Fig. 30. i i Fig. 30. (e) It will be found convenient to let x, in the above discus-sion, represent the largest factor in the equation. APPENDIX C During 1910 and 1911, an extensive series of experiments weremade at Missouri Scho Stock Photo

RM2AKJ653–Compressed air; theory and computations . (say the y fine) will never be needed; the chart maybe set out as suggested in Fig. 30 and only that portion above BHretained on the finished chart. Thus the scale may be enlargedand accuracy increased thereby. 178 COMPRESSED AIR Evidently the essential proportions of Fig. 27 are not changedby putting the chart in the shape of Fig. 30. i i Fig. 30. (e) It will be found convenient to let x, in the above discus-sion, represent the largest factor in the equation. APPENDIX C During 1910 and 1911, an extensive series of experiments weremade at Missouri Scho

Low Pressore Steam or Hot Water Heating.c New York Central Iron Works Lock Box 40 Back Page each insertion 61.00 a line. VICTORS ARE BEST BOSTON MASS. PI KODAK CAMERA Makes 100 Instantaneous Division of Labor The Eastman Dry Plate & Film Co. Rochester N. V. 5 Oxford St. London. OIL ENGINES. SHIPMAN ENGINE CO. su-s RECENTLY PUBLISHED. MUNN dc CO. Solicitors of Patents PATENTS. Beaver Falls Pa. . Solved rapidly and accurately by using the Complometer. Saves 40 per cent of time. Entire relief} rom mental strain Adapted to all commercial and scientific computations. Send for circular. THE Stock Photo

RM2ABX4PF–Low Pressore Steam or Hot Water Heating.c New York Central Iron Works Lock Box 40 Back Page each insertion 61.00 a line. VICTORS ARE BEST BOSTON MASS. PI KODAK CAMERA Makes 100 Instantaneous Division of Labor The Eastman Dry Plate & Film Co. Rochester N. V. 5 Oxford St. London. OIL ENGINES. SHIPMAN ENGINE CO. su-s RECENTLY PUBLISHED. MUNN dc CO. Solicitors of Patents PATENTS. Beaver Falls Pa. . Solved rapidly and accurately by using the Complometer. Saves 40 per cent of time. Entire relief} rom mental strain Adapted to all commercial and scientific computations. Send for circular. THE

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Compressed air; theory and computations . reading from the next succeeding one.The several differences reveal whether or not the instrument, inthe hands of the individual can be depended on to give reliableresults. The sum of the differences divided by the number of Vernier Difference Error Per cent. Reading at start 794184578964362753 390394386398391 1 392 3392 5392 7392 0392 Pass zero After first round -0.25 After second round -0.75 -1.28 Pass zero -1.80 After fourth round After fifth round 0.00 Total for five rounds, 1,959 1959 4.00 - = 392 = average and s^ = 1-03 = planimeter constant. 10 Stock Photo

RM2AKJE7H–Compressed air; theory and computations . reading from the next succeeding one.The several differences reveal whether or not the instrument, inthe hands of the individual can be depended on to give reliableresults. The sum of the differences divided by the number of Vernier Difference Error Per cent. Reading at start 794184578964362753 390394386398391 1 392 3392 5392 7392 0392 Pass zero After first round -0.25 After second round -0.75 -1.28 Pass zero -1.80 After fourth round After fifth round 0.00 Total for five rounds, 1,959 1959 4.00 - = 392 = average and s^ = 1-03 = planimeter constant. 10

Inside Page. each insertion 75 cents aline. Beaver Falls Pa. TO BUSINESS MEN 361 Broadway. New York. TIE AM:RICANIMITEPIDECO. VIOLINS EXCHANGED & Parker 66Pine Street York. Victor Bicycles BOSTON. MASS. TYPEWRITER NEW ERA PATENTS! --okott. BARREL KEG Hogshead E. & B. HOLMES ANEW CATALOCU 1000 THE ORIGINAL UNVULCANIZED RACKING JENKINS B08.i THE FRED 'K CRANE CHEMICAL CO. WElTMYER PAT1MT FURNACE. BOILERS OF EVERY DESCRLPTION. Manufactured by FOUNDRY & MACHINE DEPT. Harrisburg Pa. U. S. A. POP SAFETY VALVE WATER RELIEF VALVE STEAM ENGINE INDICATOR REMINGTON STANDARD TYPEWRITER. Gold Medal-Paris Stock Photo

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Compressed air; theory and computations . achine, with its greater friction, to do a givenamount of effective work. Example 4b.—A compressor cylinder is 12-in. diameter by16-in. stroke. The clearance is found to hold 1% pt. of water = -^- X 231 = 36 cu. in., therefore c 8 113 X 16 0.02. 14 COMPRESSED AIR Then by Eq. (11) when r = 1 and n = 1.25. E = 1 + 0.02(1 - 708) = 92 per cent. Such a condition is not abnormal in small compressors, and thevolumetric efficiency is further reduced by the heating of airduring admission as considered in Art. 6. Art. 5. Effect of Clearance and Compression in Ex Stock Photo

RM2AKJDT4–Compressed air; theory and computations . achine, with its greater friction, to do a givenamount of effective work. Example 4b.—A compressor cylinder is 12-in. diameter by16-in. stroke. The clearance is found to hold 1% pt. of water = -^- X 231 = 36 cu. in., therefore c 8 113 X 16 0.02. 14 COMPRESSED AIR Then by Eq. (11) when r = 1 and n = 1.25. E = 1 + 0.02(1 - 708) = 92 per cent. Such a condition is not abnormal in small compressors, and thevolumetric efficiency is further reduced by the heating of airduring admission as considered in Art. 6. Art. 5. Effect of Clearance and Compression in Ex

Asbestos Sectional Pipe Covering A Non - Conducting Covering for Steam and Hot Water Pipes etc. READILY ATTACHED OR REMOVED BY ANY ONE. H. W. Johns' Asbestos [Billboard Sheathings Building Felts Fire-Proof Paints Liquid Paints Asbestos ROOfl22 etc. 9.1fbvertisemertie. NEW KODAKS PATENTS! NICKEL MATERIAL TO BOSINESS MEN The MOTOR of 19th CENTURY. ARNAIBILL TEZP0Cfl. 95 MILK ST. BOSTON MASS. BARREL KEG Hogshead STAVE MACHINERY factured by 'Jul Broadway New York. Park Row New York City and branch offices in nearly every principal city on the globe. Elevators for Passengers and Freight. They are Stock Photo

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$Compressed air; theory and computations . equation, hence anytwo being known the third can be found. Table for Charting Equation, v2 = 35.13 hdinNote H log 35.13 = 0.7728 and 3 X 0.7728 = 2.318 v line h line d line V log V fv log V h log h fh log ft d log d fd log d ^^ The following notes may help the student when designingcharts for other equations of the form given in Eq. I. (a) If the constant (a, Eq. I) becomes a proper fraction its log.is minus and the point F must be set above G instead of below;the zero of scale to be set at F when measuring out the X logs. (b). If the equation takes Stock Photo$

RM2AKJ6AW–Compressed air; theory and computations . equation, hence anytwo being known the third can be found. Table for Charting Equation, v2 = 35.13 hdinNote H log 35.13 = 0.7728 and 3 X 0.7728 = 2.318 v line h line d line V log V fv log V h log h fh log ft d log d fd log d ^^ The following notes may help the student when designingcharts for other equations of the form given in Eq. I. (a) If the constant (a, Eq. I) becomes a proper fraction its log.is minus and the point F must be set above G instead of below;the zero of scale to be set at F when measuring out the X logs. (b). If the equation takes

Paint Riyolod Monarch Robber Bollix. THE GUTTA PERCHA AND RUBBER MFG. CO. 35 Warren Street New York. RN- HARRISON CONVEYOR! The CHANDLER PATENTS! Eeemo=y H. W. JOHNS' ASBESTOS MATERIALS VULCABESTON. H. W. JOHNS MFG. CO. Sole Manufacturers 87 Malden Lane New York. Established 37 years and at present the largest Elevator Works in the world. OTIS BROTHERS & CO. General Offices 38 Park Row New York City and branch offices in nearly every principal city on the globe. Elevators for Passengers and Freight. They are smooth-running eco COMPTOMETER PROBLEMS by using the Comptometer. Saves 40 per cent Stock Photo

RM2ABX5PB–Paint Riyolod Monarch Robber Bollix. THE GUTTA PERCHA AND RUBBER MFG. CO. 35 Warren Street New York. RN- HARRISON CONVEYOR! The CHANDLER PATENTS! Eeemo=y H. W. JOHNS' ASBESTOS MATERIALS VULCABESTON. H. W. JOHNS MFG. CO. Sole Manufacturers 87 Malden Lane New York. Established 37 years and at present the largest Elevator Works in the world. OTIS BROTHERS & CO. General Offices 38 Park Row New York City and branch offices in nearly every principal city on the globe. Elevators for Passengers and Freight. They are smooth-running eco COMPTOMETER PROBLEMS by using the Comptometer. Saves 40 per cent

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. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. in back pressureis easily obtained. Computations for an engine having a clearance of 5 per cent,supplied with steam at 80 pounds pressure and cutting off at ^4stroke, show that raising the back pressure 3 pounds calls for acorresponding increase of only 5 pounds in the boiler pressure tomaintain the same power of the engine. The indicator card shows a back pressure of about 3 poundswhen an engine is exhausting into the atmosphere, so that an in-crease of 3 pounds would bring the p Stock Photo

RM2CEPX59–. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. in back pressureis easily obtained. Computations for an engine having a clearance of 5 per cent,supplied with steam at 80 pounds pressure and cutting off at ^4stroke, show that raising the back pressure 3 pounds calls for acorresponding increase of only 5 pounds in the boiler pressure tomaintain the same power of the engine. The indicator card shows a back pressure of about 3 poundswhen an engine is exhausting into the atmosphere, so that an in-crease of 3 pounds would bring the p

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RFGJYD37–office business dealings deal

Low Pressure Steam or Hot Water Heating. The Dunning Patent Wrought-Iron Boiler Victor Bicycles BOSTON MASS TO INVENTORS AND MANUFACTURERS The 58th Annual Exhibition JKODAK CAMERA The Eastman Dry Plate & Film Co. Rochester N.Y. 5 Oxford St. London. PATENTS. HIGH-GRADE ONLY. COLUMBIA Bicycles Tricycles Tandems Safeties. EIKONOGEN. 0 BUSINESS MEN. POP SAFETY VALVE -JD( IMPROVED STEAM GAGE POWERFUL! DIFFUSIVE! INDUSTRIAL EIGHT COMPANY 196 Temple Court New York City. TR AERICAIILL CI. 95 MILK ST. BOSTON MASS. OIL ENGINES. T7IIIIAMMEMTM=1.13. Electric Indicating and Recording PAINT YOUR ROOFS Stock Photo

RM2ABX56N–Low Pressure Steam or Hot Water Heating. The Dunning Patent Wrought-Iron Boiler Victor Bicycles BOSTON MASS TO INVENTORS AND MANUFACTURERS The 58th Annual Exhibition JKODAK CAMERA The Eastman Dry Plate & Film Co. Rochester N.Y. 5 Oxford St. London. PATENTS. HIGH-GRADE ONLY. COLUMBIA Bicycles Tricycles Tandems Safeties. EIKONOGEN. 0 BUSINESS MEN. POP SAFETY VALVE -JD( IMPROVED STEAM GAGE POWERFUL! DIFFUSIVE! INDUSTRIAL EIGHT COMPANY 196 Temple Court New York City. TR AERICAIILL CI. 95 MILK ST. BOSTON MASS. OIL ENGINES. T7IIIIAMMEMTM=1.13. Electric Indicating and Recording PAINT YOUR ROOFS

RFGJYD38–office business dealings deal

RFGK56EM–file folder

Victor Bicycles BOSTON MASS. 2 THE KODAK CAMERA Makes 101) instantaneous Price S25.00. Reloading S2.0. The Eastman Dry Plate & Film Co. Rochester N. Y. 5 Oxford St. London. ANNOUNCEMENT! 35 Pam Row New York. LANTERNS ci41) PATENTS. IGH-GRADE ONLY. COLUMBIA Bicycles Tricycles Tandems Safeties. Catalogue free. POPE MFG. OB ROY LINEN HOSE . K. COTTON MILL HOSE & MILL SUPPLIES. BOSTON WOVEN HOSE CO. 34 Devonshire Street Boston. 222 Lake Street Chicago. POP SAFETY VALVE WATER RELIEF VALVE IMPROVED STEAM GAGE YPE WRITER ATIO N Al TYPEWRITER EXCHANGE 161 La Salle Street Chicag ill. TN AM:RICAN BELL Stock Photo

RM2ABX542–Victor Bicycles BOSTON MASS. 2 THE KODAK CAMERA Makes 101) instantaneous Price S25.00. Reloading S2.0. The Eastman Dry Plate & Film Co. Rochester N. Y. 5 Oxford St. London. ANNOUNCEMENT! 35 Pam Row New York. LANTERNS ci41) PATENTS. IGH-GRADE ONLY. COLUMBIA Bicycles Tricycles Tandems Safeties. Catalogue free. POPE MFG. OB ROY LINEN HOSE . K. COTTON MILL HOSE & MILL SUPPLIES. BOSTON WOVEN HOSE CO. 34 Devonshire Street Boston. 222 Lake Street Chicago. POP SAFETY VALVE WATER RELIEF VALVE IMPROVED STEAM GAGE YPE WRITER ATIO N Al TYPEWRITER EXCHANGE 161 La Salle Street Chicag ill. TN AM:RICAN BELL

RFR3341H–thank you for shopping !

COPPER TUBES Beaver. Falls Pa. THERMO-MAGNETIC GENERATOR STEAM ENGINES Upright and Horizontal Portable and Semi-Portable. JAMES LEFFEL & CO. SPRINGFIELD 00 or 0 Liberty St. New York WORKING MODELS HARRISON CONVEYOR! THIAERICAIIELL TEPEE CO. CHEMISTRY OF SUBSTANCES 361 Broadway New York. HYDRAULIC ELEVATOR AT LES 9.0verfisements. THE KODAK CAMERA Makes 100 Instantaneous The Eastman Dry Plate & Film Co. Rochester N.Y. 5 Oxford St. London. MS tco BS plication. Springfield Bicycle Mfg 17E1Co1u.=.biaA.vera.u.e BOSTON' lif.A.SS PATEN MUNN At CO. Solicitors of Patents 'I' MI MI cfrientific intrican Stock Photo

RM2ABX4JP–COPPER TUBES Beaver. Falls Pa. THERMO-MAGNETIC GENERATOR STEAM ENGINES Upright and Horizontal Portable and Semi-Portable. JAMES LEFFEL & CO. SPRINGFIELD 00 or 0 Liberty St. New York WORKING MODELS HARRISON CONVEYOR! THIAERICAIIELL TEPEE CO. CHEMISTRY OF SUBSTANCES 361 Broadway New York. HYDRAULIC ELEVATOR AT LES 9.0verfisements. THE KODAK CAMERA Makes 100 Instantaneous The Eastman Dry Plate & Film Co. Rochester N.Y. 5 Oxford St. London. MS tco BS plication. Springfield Bicycle Mfg 17E1Co1u.=.biaA.vera.u.e BOSTON' lif.A.SS PATEN MUNN At CO. Solicitors of Patents 'I' MI MI cfrientific intrican

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Computations Cut Out Stock Images

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