320 Tue Microscopr, 
EXCHANGES. 
This department is for the benefit of suBSCRIBERS who haye microscopical appar- 
atus. 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 CHEAP—A Bausch & Lomb Polariscope in tirst-class condition. 
Address W. J., 32 West Noble St., Columbus, Ohio 
OR EXCHANGE—A Hailes’ ‘* Poly-Microtome” (an automatic microtome for 
freezing or paraftine-embeddiug), in exchange for a Kodak camera, or other 
good ‘‘ detective.” C.E Hanaman, Box 27, Troy, N. Y. 
OR SALE CHEAP—A Bausch & Lomb Universal Microscope complete, with 
objectives and accessories, perfectly new. Address, 
Prof. C. F. Emery, Ocean Springs, Miss. 
oR EXCHANGE-—A large variety of minerals and rocks, som2 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, 215 Howard St., Detroit, Mich. 
OR SALE—Vols. IV, V, VI, VU, of THe Microscope, bound in two volumes; 
fourth edition of Wyeth’s “ The Microscopist;’’ Marsh’s;‘ Section Cutting,” an 
Phin’s ‘‘ How to Use the Microscope,”’ For cash only. 
H. M. Richards, 27 Ellery St, Cambridge, Mass. 
OR SALE—Bausch & 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 2inch eye-piece, camera lucida, etc. Eyerything in perfect order. Will 
be sold cheap. Correspondence solicited. Address, 
S. G, Robbins, Sivery. Pa. 
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. 
| ee EXCHANGE—A Browning’s Student’s Spectroscope, for a microscope stand 
or other apparatus. C. E. Norton, M. D., Lewiston, Me. 
OR SALE—Fine collection of 144 choice microscopic objects by Wheeler, Moller 
Watson, and others, including Webb’s celebrated micro-writing, arranged Dia- 
toms, Type-plate of Echinoidea, Podura and other tests, in box with lock and key, 
$40, all new. Send for list. Also, Tolles’ first-class 4% water immersion, 180°; cost 
$70, price $37.50; also, Spencer’s latest homo-imm, 1-10, 116°, B.ZA., $52.60. 
Geo. H, Curtis, New Richmond, Clermont Co., Ohio. 
OR EXCHANGE OR SALE—For microscopical materials or offers: A good Toep- 
ler-Holtz Electrical Machine. 12% inch revolving plate, and current breaker, 
Leyden jar, Geissler tubes and numerous other accessories, the whole costing about 
$60. Will sell or exchange for a good microscope, and pay difference. Correspondence 
solicited. F. F. Wood, Prin. Blair Graded School, Blair, Wis, 
ARE MOUNTS for sale or eel aeons of Ornithorhynchus paradoxus; mum- 
my cloth, three thousand years old; sections of bark from Charter Oak tree. 
Address, Prof. H. M. Whelpley, St. Louis, Mo, 
‘| X Y ANTED—THE Microscoprk, Vols. I to IV inclusive. 
W.E. Swigert, Spencer, Owen Co., Ind. 
ANTED-—Seyveral 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. yon Eiff, 20 Palmetto St., Brooklyn, N. Y. 
W *xhinty copy of the “‘ Microscopical Bulletin,’ Vol I, No.5, August. 1884. for 
which I will send two interesting slides. 
M. S. Wiard, New Britain, Conn. 
ANTED—Odd volumes and numbers of microscopical periodicals and books on 
the microscope. Will give microscopical periodicals in return. Send list of 
what you have and want. 
Prof. L. A. Lee, Brunswick, Me. 
