I 
bo 
THe Microscope. 
EXCHANGES. 
(Exchanges are inserted or this page without charge. Subscribers having 
microscopic apparatus for sale or exchange can announce the same without 
charge.) 
IATOMS ON ALGA. Achnanthes bevipes, etc., Polycistana, Fossil 
Diatoms, etc., Sertularia Pluma, Sertularia Crustata, etc. Spore cases 
of Fern too numerous to mention, to exchange for well mounted objects. 
WM. FARNELL, Macon, Ga. 
HAVE quite a collection of histological mounts which I should like to 
excha ange for other good slides. E. M. WATERBURY, M. D., Saratoga 
Springs N. xe 
XCHANGE.—I have a large number of vegetable mounts, single and 
double staining. Would like to exchange tor ary specimens of inter- 
est. MISS L. M. BERKEY, Grand Rapids, Mich. 
AVE a large number of histological mounts for exchange. T. B. 
STOWELL, Pu. D., Cortland, N.Y. 
I W ILL 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, Iil. 
XCHANGE.—Untreated diatoms and miscellaneous material in large 
variety to exchange for good prepared material for mounting of any 
kind. M. A. BOOTH, Longmeadow, Mass. 
LARGE number of histological specimens, handsomely mounted, for 
exchange for any kind of mounts for the microscope. G. A. 
SPR ECHER, M. D., Oakland, Cal. 
H AVE a 1- 11 in. objective made by Verick, works either wet or dry. 
When the front system is removed it becomes a fine 4 suitable for tis- 
sues. Has society screw and brass box. I wish to exchange it for a Rem- 
ineton Rifle, 22 caliber. Must be first-class gun. J. O. STILLSON, 504 
Upper Second street, Evansville, Ind. 
XCHANGE—I have about one hundred Jantern slides to exchange for 
Microscopical apparatus (object-glasses), etc. W. 8S. WHITE, 128 and 
130 W. Main street, Kalamazoo, Mich. 
HOMOGENEOUS immersion (works also dry, water or glycerin) 1-15, 
180° adjustable, to exchange for a higher power. A. Y. MOORE, 57 
Prospect street, Cleveland, Ohio. 
CARI INSECTS, Spermatozoa of Horse, Pathological and other well 
mounted slides in exchange for Pleurosigma, Trichina, Diatoms, 
Stained Bacteria, etc. J. O. STILLSON, 504 Upper Second street, Evans- 
ville, Indiana. 
