288 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 arereferred to our advertising department. 



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XCHANGE.— I have well mounted slides of diatoms, also, diatomaceous material 

 which I offer for curiosities or minerals suitable for a cabinet. 



F. L. CAUCH, Carpenteria, Santa Barbara Co., Cal. 



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ANTED.— To purchase a Bausch & Lomb Universal Microscope with attachments. 

 Give number of attachments, objectives and price. 



DR. W. N. BAHRENBURG. 919 Wash. St.. St. Louis. Mo. 



LABELS for Slides; also, Slides and Material. 

 EUGENE PINCKNEY, Dixon, 111. 



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OR EXCHANGE.— Diatomaceous Earth from Los Angeles, for good mounts. 



M. H. ALTER, M. D., 41 South Spring St., Los Angeles, Cal. 



FOR SALE.— A Bausch & Lomb Universal Stand, a ^ and 1-5 objectives, glass stage and 

 slide-carrier, slide-cabinet, about 50 mounted slides, slides, cover glas.^es, stains, etc. 

 A complete outfit, new, being used about three month><. Good reasons for selling. 

 ^ F. T. MERIWETHER. M. P., Asheville, N. C. 



SALICINE-SLIDES FOR POLARISCOPE.— For exchange for thoroughly good histologi- 

 cal or pathological mounts, or for sale, a few magnificent Slides of Salicine Crystals, 

 prepared by a new process. The most gorgeous ever made. Also, some remarkable slides 

 of urinary deposits, including tube-casts (hyaline, waxy and granular), epithelia of kidney, 

 bladder, urethra, vagina, etc., blood, pus, etc., stained with eosin and osmic acid. 



FRANK C. JAMES, Box 56.s, Saint Louis, Mo. 



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XCHANGE.— Will exchange slides of vegetable sections, double-stained, for other good 

 slides, preferably of the same nature. 

 CHAS. E BARR, 301 Clinton St.. Cleveland, O. 



OR SALE OR EXCHANGE— A first-class ToUes dry, X in. 100°. in perfect condition. 

 Price, $25. C. L. PETICOLAS. 6:j5 Eighth St. N . Richmond. Va. 



FOR SALE— One copy Van Heurck"s Synopsis Diatoms, Plates bound, best library, text 

 unbound, in perfect order. Price $40. Also 1-10 objective. Homo, im , 125° balsam 

 angle, made by Herbert R. Spencer in 1883. Cost $80. will sell for $55. Perfect order, 

 used very 111 tie. Address H. F. DOUGLAS, Fenton, Mich. 



FOR SALE — .A Bausch & Lomb Investigator Microscope complete, with improved glass 

 stage and slide-carrier extra. Cost $75 only a few months ago, has not been used a 

 dozen times; is perfect in every particular. Will sell for 20 per cent, less than cost. 

 Correspondence solicited^ G. H. BRICKETT, M. D., Augusta, Me. 



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OOD MOUNTS— Vegetal and various, for a simple section cutter. 



A. E. WARREN, Rio Vista, Va. 



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UEEN'S COMFORTABLE TURN-TABLE in exchange for Rindfleisch's Pathology, or 

 Dolley's Technology of Bacteria A. L. HOLDEN, 136 South St , Utica, N. Y. 



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OR SALE— A Zentmayer 8-10 and 1-5 objectives; also, a B. and C. eye-piece, in good 

 condition. The maker should be guarantee of quaUty. 

 J. G. DENG L ER, Sellersville. Pa. 



FOR SALE — A perfectly new Bausch & lomb Universal Microscope; has never been 

 used. This includes two eye-pieces, one with micrometer; a 3-4 inch and a 1-5 

 inch objective; a camera lucida, a test-slide, pliers, slides and covers. Purchaser receiving 

 in addition a copy of Carpenter's ''Microscope and its Revelations,'" Stokes' "Microscopy 

 for Beginners" (new), Davis on Mounting, and Bausch's manipulations of the Microscope. 

 All in neat box with lock and key. Price $50. 

 A. H. STIEBELING, M. D., No. 138 Second St . , New York City. 



FOR SALE— A very good microscope ; monocular, with case, eye-pieces and objectives, 

 all being as good as new. Will st»ll at a good bargain; full particulars given. Address 

 (Correspondence solicited.) CHARLES VAN EIFF , 347 Greenwich St., New York City. 



ANTED— Standard books on Rotifera, Infusoria, Diatoms, Algae, 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 CaroUna. 



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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 hornblende. State which you prefer and I will endeavor to give 

 satisfaction. D. M FULLKR, 1.^4 Hamilton St., Albany, N. Y. 



