160 The Miceoscope. 



EXCHANGES. 



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

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

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



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. Tolles 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. RICHARDS, Sadsburyville P. O., Chester Co., Pa. 



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

 Would exchange for a first-class H inch objective. 



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



FOR SALE— Nachet microscope, manacular, slide carrier on stage, 4 objectives. Nos. 24, 

 1, 3 and 5, French; 2 eye pieces; bull's 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. A. FERNALD, M. D., 1483 Washington St., Boston, Mass. 



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

 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, plies with 

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

 class instrument, cost $95, will take $80. 



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

 Lomb preferred. E. H. RICHARDS, Woburn, Mass. 



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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. 



ANTED— 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/^ in. diameter, both Bausch & Lomb. Address 

 F. W. POINDEXTER, JeffersonviUe, Ind. 



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

 imusual products of urine. J. M. ADAMS, Watertown, N. Y. 



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



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



Exchange; — Tegel (Fossil Deposit) from Briimm, Moravia, Austria containing fiiie 

 forms and Marine Diatoms. 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. 



WANTED— Second-hand Microscope of modern American make, with accessories and 

 objectives, 2 inch to % inch focus. Parties having same, in whole or in part, please 

 address EDWIN A. HILL, 26 W. New York St., Indianapolis, Ind. 



O EXCHANGE— Carpenters, "The Microscope and its Revelations," new, for Real's 

 " One hundred urinary deposits," and Dollv"s " Technology of Bacteria Investigation." 



A. R. BOOTH. M. D., Shreveport, La. 



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POUNDS Gulf Marine diatom muds for exchange; 10 selections of cleaned Marine 

 Gulf diatoms. Correspondence invited from anyone. 



K. M. CUNNINGHAM, Land Ofiace, M. & O. R. R. Co. 



WANTED— Part I (plates and text) of Special Report on the Cood. Fishes and Fisheries 

 Industries of the U. S., 1882, devoted to the natural history of useful aquatic 

 animals. Give lowest cash price. E. S. COUTANT, Hawk's Park, Florida. 



