128 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 INSERTED FREE OF 
CHARGE. The number of insertions given will depend upon the number of exchanges 
received each month. Subscribers will please notify us when articles have been exchanged 
or sold. Dealers are referred to our advertising department. 
OR SALE—Vols. IV, V, VI, VII, of THE Microscope, bound in two volumes; quarto 
edition of Wyett’s ‘‘ The Microscopist;”’ Marsti’s *‘ Section Cutting,’ and Phin’s *How 
to Use the Microscope.’’ For cash only. 
H. M. RICHARDS, 27 Ellery St., Cambridge, Mass. 
ANTED—Histological and pathological material to cut on the halves. Nothing but 
first-class material desired. Address C. B. CLAPP, M. D., Danville, II. 
OR SALE—Choice slides of encysted trichina spiralis in muscles of cat, with cystic 
plexus of capillaries injected red; very fine. Write at once for these novelties. 
FRANK S&S. ABY, lowa City, lowa. 
ARE MOUNTS for sale or exchange: hair of Ornithorhynchus paradoxus; mummy 
cloth, three thousand years old; sections of bark from Charter Oak tree. Address 
PROF. H. M. WHELPLEY, St. Louis, Mo. 
OR EXCHANGE OR SALE-—For microscopical materials or offers: A good Toepler- 
Holtz Electrical Machine, 12’ inch revolving plate, and current breaker, Leyden 
jar, Geissler tubes and numerous other accessories, the whole costing about $60. Will 
exchange for a good microscope, and pay difference. Correspondence solicited. 
F. F. WOOD, Prin. Blair Graded School, Blair, Wis. 
Wi EXCHANGE—A complete set, up to 1889, of the Journal of the (English) Postal 
Microscopical Society, for good mounts, micro-apparatus, ete. Address 
A. B. AUBERT, Maine State College, Orono, Maine. 
XCHANGE—Indian curios, Indian blankets, bows, arrows, pottery ete, gold and silver 
cabinet specimens, polished, petrified wood, turquois, garnets, amethysts. cactus 
plants, skins of wild animals, ete., all from Arizona; also, one good second-hand Burt’s 
Solar Compass complete. Will exchange any or all of the above for new or good second- 
hand Abbe Condenser, polarizer, camera lucida, objectives, eye pieces, stand, or other good 
microscopic apparatus. Address W. N. SHERMAN, M. D., Kingman, Arizona. 
OR SALE—AB. & L Scction Cutter, glass top, and micrometer screw, in perfect order, 
good as new, cost $7 50; will sell for $5. 
H. F. WEGENER, 1305 S Tenth St., Denver, Col. 
OR A CHOICE ASSORTMENT OF MICROSCOPIC SLIDES, send, in exchange, a 
parcel of minerals and rocks, or of bones and teeth of extinct animals, or of diatoma- 
ceous and polycistinous earths, or of diatoms in situ on marine algee. Exchangers will be 
liberally dealt with. A. J. DOHERTY, 63 Burlington St., Manchester, Eng. 
XCHANGE—Good mounts of animal tissues, human and other, in health and disease, 
which I offer in exchange for books on microscopy, histolcgy, pathology and bacteri- 
ology. Correspondence invited. E. D. BONDURANT, Tuskaloosa, Ala. 
Napearep A copy of Van Heurck’s work on Diatoms, bound or unbound. Will pay 
cash. ALBERT MANN, JR., Newark, N. J. 
wt ALICINE AND ASPARAGINE CRYSTALS.—Extra fine for polariscope. Will exchange 
for first class miscellaneous mounts. Would like a slide of Trichina and Jtch Insect. 
b. W. HASKINS, 1985 Euclid Ave., Cleveland, Ohio. 
ANTED.—A copy of Rev. William Smith’s English Diatoms; also Schmidt’s Catalogue 
of the Diatomacez; also cleaned diatoms fiom Tampa Bay. Mobile and Nottingham. 
Will exchange or buy. JAMES B. SHEARER, Bay City, Mich. 
Na evel. IlI, No. 1, will pay 50 cents for it. Vol. V, No. 5; Vol. VI. Nos. 1 and 9. 
LANCKT & CLINIC, 199 W: 7th St., Cincinnati, Ohio. 
OR EXCHANGE.—No. 6, Vol. II; Nos. 2, 4 and 5, Vol. Ill; Vol. 1V, complete; No. 1, Vol. 
VIL; for microscopical books or pamphlets. Protozoa or Rotifera desired. 
H. H. CODDINGTON, Kalamazoo, Mich. 
OR EXCHANGE—Good histological or pathological mounts in exchange for other good 
mounts or material, general or special. 
8S. G. SHANKS, M. D., 547 Clinton Ave., Albany, N. Y. 
