64 The Microscope. 



EXCHANGES. 



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

 material or books which they wish to exchange, and such wants will be inserted free of 

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

 received each month. Subscribers will please yiotify us when articles have been exchanged 

 or sold. Dealers are referred to our advertising department. ' 



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, ihat I exhausted my stock of slides of salicine and urinary deposits 

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

 as editor and physician have thus far given me no opportunity to make auy 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 3Iicroscope. 



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



WANTED TO EXCHANGE— Six complete volumes of r/i« American Monthly Micro- 

 S'opical Journal — Vols. I, II, III, IV, V. VI, for first-class diatoms or double-stained 

 plant sections. Correspondence solicited. Address, 



\V. C. COUTES, Box 66, Haverhill, Mass. 



FIRST-CLASS HISTOLOGICAL AND PATHOLOGICAL MOUNTS in exchange for 

 instruments or books on Microscopy. 



A. J. C. SAUNIER, M. D., 92 Laflin St., Chicago, 111. 



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\NTED— Nos. 1, 2, 3 and 5 of Vol. I of The Microscope— 25c each paid. Address this 

 office. 



FOR SALE OR EXCHANGE— Mounted urinary sediments, pathological specimens, 

 photo-micrographs, anatomical and pathological material, for mounted slides or pho- 

 tomicrographs on medical subjects. E. L. S.VIITH, Belief ontaine, Ohio. 



FOR SALE— A fine Beck's Ideal 1-6 objective, adjustable, unused a-d pi-rfect; corrections 

 excellent. Beck's list price, $30; will sell for $20, or will exchange for a new first-class 

 1-2 or 4 10 inch objective. D. HUMPHREY, Lawrence, Mass. 



WANTED TO PURCHASE-^?jierican Journal of Microscopy, Vol. I, 1876, Nos. 1 and 

 8; Vol. III. 1877, No. 2; Vol. IV, 1879, Nos. 3, 5 and 6; Vol. V, 1880, No. 7; Vol. VI, 

 1881, No. 5; America)! Monthly Microscopir<U Journal. Vol I, 1880, Nos. 5, 7, 9 and 11; Vol. 

 n, lb81, Nos 1, 8. 9, 10. 11 and 12; Vol. VI. 1885, No. 10; Vol. VII. 1886, No. 11: American 

 Quarterly Microscopical Journal, Vol. I, 1879, Nos. 1, 2, 3 and 4; The Microscope, Vol. I, 

 1881, complete. Address C. C. MELLOR, 77 Fifth Ave., Pittsburgh, Pa. 



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OUNTS OF FCETAL (5 MONTHS* LUNG, section across entire lobe, 1-2000 in. thick, 

 beautifully stained, in exchange for first-class Pathological Slides. 



W. C. BORDEN, M. D., U. S. A., Fort Douglas, Utah. 



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ISTOLOGICAL, PATHOLOGICAL AND MISCELLANEOUS MOUNTS for exchange 

 by H. W. WESTOVER, M. D., St. Joseph, Mo. 



TUBES OF CLEANED DIATOMS, in exchange for mounted slides or good material. 

 For list, etc., address A. B. AUBERT, Orono, Penobscot Co., Maine. 



FOR EXCHANGE.— Slides of vegetable and animal sections, all double-stained, new 

 process, for hair of full-blooded Indian, elephant's beard and tail, trichina meat, and 

 well-mounted slides. J. D. BECK, 305 Church St., Williamsport, Pa. 



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OOD histological or pathological mounts for other flrst-cla's mounts. 



S. G. SHANKS, M. D., 547 Clinton Ave., Albany, N. Y. 



FOR SALE — Beck Popular Binocular with complete outfit, 2-in., 1-in. and H ob. polari- 

 scope, parabola, double nose-piece, 3 sets eye-pieces, etc . in perfect order, only 

 tarnished. Price, «80. Address WM. H. SEAMAN, Patent Office, Washington, D. C. 



WANTED— B. eye-piece (to fit Bausch & Lomb's smaller stands), a camera lucida, a stage 

 mi'jrometer (metric preferred) and a good turn-table; al<o Carpenter, or Beale, of 

 the Microscope. Will exchange for above, books on Mineralogy and Chemistry and general 

 literary works. Correspondence solicited. A. F. BARNARD, Box 152. Oberlin, O. 



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XCHANGE. — I have well-moi)nt«d slides of diatoms, also diatomaceous material which 

 I offer for curiosities or materials suitable for a cabinet. 



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



