193 The Microscope. 



EXCHANGES. 



This department is for the benefit of subscribers who have microscopical apparatus, 

 material or books which they wish to exchange, and such wants will be given one insertion 

 FREE OF CHARGE. Dealers are referred to our advertising department. 



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ANTED— Standard books on Rotifera, Infusoria, Diatoms, Algee, etc. Will exchange 

 general scientific and literary works for the above. 



JAMES E. WHITNEY, Rochester, N. Y. 



OR EXCHANGE OR SALE— Double-stained Bacillus Tuberculosis slides. Will 

 exchange for histological or pathological mounts. 

 F. T. MERIWETHER, M. D., Asheville, North Carolina. 



FOR EXCHANGE— I have for exchange for mounted slides, specimens of crystallized 

 quartz, microscopic and small, perfect crystals, crystals from one-half to three 

 inches in diameter, crystals containing floating particles, crystals containing cavities, and 

 some containing hornblend. State which you prefer and I will endeavor to give 

 satisfaction. D. M. FULLER, 154 Hamilton St., Albany, N. Y. 



QUEEN'S "Physiological" microscope, complete incase and in perfect condition, with 

 one eye piece and 1-2 and 1-6 inch objectives and camera lucida. Will sell for $dU, 

 or exchange for a high gi'ade 1-2 or 4-10 inch objective— Gundlach or Bausch & Lomb 

 preferred. HORACE G. WETH ERI LL, M. P., Trenton, N. J. 



WANTED— Copy of " Hogg on the Micro-cope," latest edition, for which I will ex- 

 change secondhand copy of Beale's "How to Work with the Microscope," in good 

 condition Address W. T. COX. M. P., Groesbeck, Texas. 



FOR SALE— A Tolles 1-10 glycerine im. 180°, a Wenhaus Reflex Illuminator, made by 

 Mr. ToUes to use with the above lens, and a Fasoldt Micrometer, 1-5,000 to 1-120,000, 

 all in fine condition and cheap. Best of reasons given for selling. Address 

 F. J. SCHAUFELBERGER. Hastings. Neb. 



R. JAMES E. REEVES, 2235 Chapline street. Wheeling, W. Va , will dispose of a few 

 of his fine mounts of typhoid bacilli, grown on potato. 30th culture, etc. 



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WILL EXCHANGE slides of plants, bark, heart and tongue of swine, all double 

 stained, for good histological slides double stained with sulph-indigotate soda and 

 carmine. Satisfaction sure. Correspondence solicited. 



J. D. BECK. Box 10, Liberty, Tioga Co., Pa. 



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ANTED- Injecting syringe, case of dissecting instruments, and a valentine knife ; 

 will give fine slides or cash. 

 HERBERT M. RICHARPS, Sadsburyville P. O . , Ch es ter Co., Pa. 



I HAVE a very fine case for a microscope, 18 inches high and 8 inches square, inside. 

 Would exchange for a first-class k inch objective. ' 



A. W., No. 42 Allen St., Jamestown. N. Y. 



FOR SALE— Nachet microscope, manacular, slide carrier on stage, 4 objectives, Nos. 34, 

 1, 3 and 5, French ; 2 eye pieces ; buirs eye condenser : 24 objective makes an 

 excellent illuminator ; camera lucida ; forceps ; mahogany silk-lined lock case, slides, etc. 

 Cost 625 fr. Price, net. $75. Address 



C.Ji. . FE RNALP, M. P., 1483 Washington St., Boston. Mass. 



FOR SALE— A Beck Binocular Economic microscope, in perfect condition, with 1% 

 inch object glasses, two pairs of eye-pieces, concave and plane mirrors, side condens- 

 ing lens for illumination of opaque objects, movable glass stage, stage forceps, pUes with 

 ledge, in mahogany case, stand 15>^ in. high. Has been used about twenty times. A first- 

 cl ass instrument, cost $95, will take $80. 



ANTEP— A two-inch objective, C eye piece and polarizing apparatus, Bausch & 

 Lomb preferred. E. H. RICHARPS. Woburn. Mass. 



ILL EXCHANGE fine mounts of gold, silver, copper or tin, or of crystals for pleni- 

 cope, for good histological or botanical mounts. 



H. M HILL, 30 William St., Watertown, N. Y. 



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ANTEP— A second-hand polariscope, Bausch & Lomb preferred. Also good slides or 

 material for scientific Americans. W. C. GORMAN, Waterford, Pa. 



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ANTED— Who has for sale, cheap, first-class }i inch objective, and glass stage and 

 slide carrier, for stage 3>2 in. diameter, both Bausch & Lomb. Address 



F. W. POINPEXTER, Jeffersonvllle, Ind. 



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RINARY CRYSTALS in exchange for same, also correspondence with others on 

 unusual products of urine. J. M. APAMS, Watertown, N. Y. 



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ANTEP — A Microtome with freezing apparatus, in good working order. 



J. H. THOMPSON, 17 26th St., Kansas City, Mo. 



EXCHANGE — Tegel (Fossil Deposit) from Briinii, Moravia, Austria, containing fine 

 forms and Marine Piatoms. Samples of 50 Grammes will be sent to anyone. 

 Wanted in exchange good American Diatomaceous material of all kinds: Preferred, 

 fossil earth from Santa Monica, Santa Maria, Monterey, Cal., and Seaweeds or Seamud, with. 

 Marine Diatoms. J. C. RIMBOCK. 14 Simmering- Wein. Vienna, Austria. 



