192 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. 
nae eS Vale Ito VI of THE Microscope. Apply, stating price, to this journal. 
OR EXCHANGE-—A large variety of minerals and rocks, some polished; also fossils, 
and reptiles in fluid, for mounts. Address, 
PROF. J. E. TALMAGE, Salt Lake City, Utah. 
OR SALE—First-class duplicate objects, five for $1. You can get your objects in any 
class you may name, except pathological; but no time for lists. If you do not get $1 
worth, money will be returned on day after slides are returned. 
E. C. HOYT, 154 Howard St., Detroit, Mich. 
OR SALE—Vols. IV, V, VI, VII, of THz Microscorr, bound in two volumes; fourth 
edition of Wyeth’s ‘‘The Microscopist;’’ Marsh’s ‘* Section Cutting,’’ and Phin’s ‘How 
to Use the Microscope.”’ For cash oul 
H. M. RICHARDS, 27 Ellery St., Cambridge, Mass. 
OR SALE—A Bausch and Lomb Model Microscope (No. 521 of their catalogue), as good 
as new, having been used but a few times. There are two objectives, a 1 inch and a 
% inch, one 2 inch eye-piece, camera lucida, etc. Everything in perfect order. Will be 
sold cheap. Correspondence solicited. Address, 
S. G. ROBBINS, Siverly, Pa. 
ye RT eP tae Microscopg, Vol. I to VI inclusive. 
W. E. SWIGERT, Spencer, Owen Co., Ind. 
ANTED—Several good objectives and eye-pieces; must be in first-class condition. 
State full particulars. Also want unmounted material. Will exchange or buy. 
Correspondence invited. CHAS. VON EIFF, 20 Palmetto St., Brooklyn, N. Y. 
yeep Vol. VI, No. 1. 
LANCET & CLINIC, 199 W. 7th St., Cincinnati, Ohio. 
ANTED—Histological and pathological material to cut on the halves. Nothing but 
first-clas3 material desired. Address C. B. CLAPP, M. D., Danville, Il. 
Fo 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. 
ake 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}2 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. 
ILL 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 etc, 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—A B. & L. Section 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 alge. Exchangers will be 
liberally dealt with. A. J. DOHERTY, 63 Burlington St., Manchester, Eng. 
