THE MrIcroscopr. 193 
EXCHANGES. 
(Exchanges are inserted on this page without charge. Subscribers having 
microscopic apparatus for sale or exchange can announce the same without 
charge.) 
IATOMS ON ALGA. Achnanthes bevipes, etce., Polycistana, Fossil 
Diatoms, etec., Sertularia Pluma, Sertularia Crustata, ete. Spore cases 
of Fern too numerous to mention, to exchange for well mounted objects. 
WM. FARNELL, Macon, Ga. 
ISTOLOGICAL mounts to exchange for other good slides. 'T. B. 
STOWELL, Ph. D., Cortland, N. Y. 
XCHANGE.—I have a large number of vegetable mounts, sinvle and 
double staining. Would like to exchange for any specimens of inter- 
est. MISS L. M. BERKEY, Grand Rapids, Mich. 
( We ee adjustable 1-5 objective, 135° aperture, for sale. Dr. A. 
C. Stokes, Trenton, N. J. 
WILL exchange good, histological for other first-class mounts. S. G. 
SHANKS, M. D., 547 Clinton Avenue, Albany, N. Y. 
A. RICHARDS, of St. Louis, Mich., has for exchange a few mounts of 
e double-stained and single-stained vegetables ; also a number of well- 
mounted injected specimens. 
LEASE ANNOUNCE that I will supply labels, cards, and other first- 
class printing in exchange for good slides. EUGENE PINCKNEY, 
Dixon, Il. 
XCHANGE.—Untreated diatoms and miscellaneous material in large 
variety to exchange for good prepared material for mounting of any 
kind. M. A. BOOTH, Longmeadow, Muss. 
XCHANGE—I have about one hundred lantern slides to exchange for 
Microscopical apparatus (object-glasses), ete W.S. WHITE, 128 and 
130 W. Main street, Kalamazoo, Mich. 
XCHANGE.—A Tolles’ Binocular Eye-piece, (cost $80.00), for a tirst- 
class, wide angle Objective. J.T. MAIN, Jackson, Mich. 
CARI INSECTS, Pathological and other well mounted slides in ex- 
change for Pleurosigma, Trichina, Diatoms, Stained Bacteria, ete. 
J. O. STILLSON, Indianapolis, Indiana. 
TOR SALE,—Siides, double stained, of Bacillus Tuberculosis, 50c. each. 
DR. W. R, CHITTICK, 88 Lafayette Avenue, Detroit, Mich. 
ANTED.— Books treating on microscopical and histological subjects 
not already in my possession. Will pay cash or give slides in ex- 
change. State name of the work, date of issue, and price. C. H.STOWELL, 
Ann Arbor, Mich. 
ILL Exchange mounts of stained vegetable sections tor other mounts of 
interest. MRS. L. R. LOOMIS, Ann Arbor, Mich. 
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