138 The Microscope. 



EXCHANGES 



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

 material or books luhich they tuish to exchange, and such wants will be inserted free of 

 CHARGE. The number of insertions given will depend upon the number of exchanges 

 received each month. Subscribers loill please notify us when articles have been exchanged 

 or sold. Dealers are referred to our advertising department. 



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ANTED TO PURCHASE— Second-hand copies in good condition of Rev. Wm. Smith's 

 British Diatoms," and "New Greville Plates of Diatoms." 



JAMES B. SHEARER, Bay City, Mich. 



FOR SALE — A physician's microscope, manufactured by Bausch & Lomb; 2 eye-pieces i 

 •Z objectives, 3-4 and 1-5; micrometer and camera lucida. For further particulars 

 address A. W. ALLEN, 410 Grand River Ave., Detroit, Mich. 



FOR EXCHANGE— Diatomaceous earth from the plateau of Thibet (12,000 feet) varieties 

 localities; also material and slides from localities in Scottish Highlands. Wanted, 

 slides of American Diatoms, Insects and Botany. 



W. D. STEWART, 2 Gilmore Terrace, Edinburgh, Scotland. 



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OR EXCHANGE— Injected cysts of Trichina Spiralis. 



GILMAN DREW, Iowa City, Iowa. 



WANTED— Parasites and books on Parasites and other micro-subjects; will give 

 Anatomical, Pathological, Botanical, Blicrofungi, Zoophytes, Polycistina, Foraml- 

 nifera. Parasites, and other slides in return. Shall be glad to open an exchange at any 

 time with micro-correspondents for any of the above subjects. 



FRED. LEE-CARTER, Gosforth, near Newcastle on Lyne, England. 



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OR SALE— A Bausch & Lomb Model Microscope, with 1 in. and 3^ in. objectives. 



W. H. OSBORNE, Chardon, O. 



I HAVE a good "Little Monitor " local telegrapii souader and straight lever key (cost 

 new, about $6 to $8), both in good order; also, a Wirt fountain pen (one of the best 

 made, cost $2.50, good as new, having been used but very little; one copy, in cloth, of 

 "Parson's Handbook of Business and Social Forms," 500 pages, $3.50; never used. I wish in 

 exchange, latest editions of Beale's" How to use the Microscope," "The Microscopist," by 

 J. H. Wythe: Rev. W. W. Spicer's translation of Johann Nave's "Handbook of Collection, 

 Preparation, etc., of Algae, Diatoms, etc.," or other microscopical works. Correspondence 

 solicited. F. W. DUNNING, 32 So. Division St., Battle Creek, Mich. 



WILL EXCHANGE— Cabinet specimens of gypsum, specular, micaceous, massive and 

 earthy hematite, slides of diatoms, and literary and scientific works, for well 

 mounted slides, tubes of cleaned diatoms, and standard books on microscopy. 



A. F. BARNARD, Box 152, Oberlin, Ohio. 



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OR SALE— Powell <t Lealand No. 3 Microscope stand, with three eye-pieces and several 

 accessories. Address, A. L. WOODWARD, 53 Lansing St., Utica, N. Y. 



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ONE and fruit-stone sections for good, medium-angle objectives. 1-5 to 1 inch. 



A. E. WARREN, Rio Vista, Virginia. 



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ANTED TO PURCHASE— ^mericare Journal of Microscopy, Vol. I, 1876, No. 8, Vol. 

 Ill, 1878, No. 2. American Monthly Microscopical Journal, Vol. VII, 1886, No. 11. 

 C. C. -MELLOR, 77 Fifth Ave., Pittsburgh, Pa. 



MR. EDITOR— Will you allow me to say, through the medium of your pages, to the 

 numerous correspondents who have written me in reply to my notice in your 

 Exchange Column, that I exhausted my stock of slides of salicine and urinary deposits 

 within a few days after the appearance of the notice, and that my ever-increasing duties, 

 as editor and physician have thus far given me no opportunity to make any fresh ones. 

 Whenever I can get a few hours of leisure I shall make enough to supply all those who 

 have written me, and will give immediate notice thereof in The Microscope. 



FRANK L. JAMES, M.D., Box 568, St. Louis, Mo. 



FIRST-CLASS HISTOLOGICAL AND PATHOLOGICAL MOUNTS in exchange for 

 instruments or books on Microscopy. 



A. J. C. SAUNIER, M. D., 92 Laflin St., Chicago, lU. 



ANTED— Nos. 1, 2, 3 and 5 of Vol. I of The Microscope— 35c each paid. Address tJiis 

 office. 



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