. 
32 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 depariment. 
ie nD Nel. IV, Nos. 8 and 9. Address this office. 
| fea SALE CHEAP—112 blue prints, plates of diatoms. Correspondence solicited. 
F. L. CAUCH, Dental College, Cincinnati, Ohio. 
ye PD Mesh containing trichina. Will exchange good mounts for same. 
J. C. FALK, 800 Morgan St., St. Louis, Mo. 
OR EXCHANGE—A $50 collection of Dr. A. E. Foote’s mineral specimeus (200), for a 
good microscope. Address H. A. MUMAW, M. D., Orrville, Ohio. 
ANTED—TuHE Microscopes, Vols. I and IL, unbound; Vol. IV, Nos. 2, 3, 4,5, 8 and 9; 
also, copies of any works on microscopy not in my library. Address 
PROF. H. M. WHELPLEY, St. Louis, Mo. 
W ILL EXCHANGE histological slides for other interesting slides. 
A, F. BARNARD, Box 152, Oberlin, Ohio. 
O EXCHANGE—Diatomaceous earth from Nottingham and Calvert County, Md.; Los 
Angeles and Santa Monica, Cal., and Richmond, Va., for other diatomaceous material, 
crude or cleaned, recent or fossil (marine preferred), or for diatom or miscellaneous slides. 
None but good mounts wanted. F. W. DUNNING, Battle Creek, Mich. 
OR EXCHANGE—Good histological or pathological mounts in exchange for other good 
mounts or material, general or special. 
S. G. SHANKS, M. D., 547 Clinton Ave., Albany, N. Y. 
eon TO EXCHANGE—For anything in the microscopical line: A $60 binocular 
telescope (field-glass), the Microscopical Dictionary, and other surplus goods. 1,500 
objects. E. C. HOY’, 154 Howard St., Detroit, Mich. 
AMMALIAN HAIRS—First-class mounts, to exchange for diatoms and other ;airs. 
Lists exchanged. W.J. MARSLIN, Davidson College, N. C. 
OR SALE OR EXCHANGE FOR OTHER BOOKS—A complete set—¥0 volumes—and 
odd volumes of Pennsylvania Geological Reports of Second Survey. 
CHAS. LE R. WHEELER, 433 Adams Ave.. Scranton, Pa. 
ANTED—The following back numbers: THE Microscore: Vol. Il, No. 1. The 
Microscopical Bulletin: Vol. 1, No. 5, August, 1884; Vol. II, No. 1, February, 1885, 
and No. 5, October, 1885. For any of them I will send a well mounted and interesting 
slide for each number sent me. M.S. WIARD, New Britain, Conn. 
OR EXCHANGE—A good collection of shells, mostly American species (especially 
Californian). Wanted—Microscopical books, papers, material, apparatus, ete, Send 
description of what you have to exchange. Have also collection of duplicates of above 
shells to exchange for same, or will sell both cheap for cash. 
G. R. LUMSDEN. 
OR EXCHANGE OR SALE—Good histological or pathological mounts. Only good 
slides in any branch of microscopical science desired in exchange. For sale—1 B. & 
L. Universal Stand, with glass stage, iris diaphragm, neutral tint camera lucida, oculars A 
and ©, last out, with micrometer, double nose-piece, professional objectives, 3-4 and 1-5 iach, 
Guiffith’s focus indicator, mahogany case, 1 Griffiuh club microscope, oculars B and D, 
student objectives 3-4 and 1-5 inch, in case, all in excellent condition. Also a B, & L. 
mecuanical stage, perfectly new. : 
WM. N. BEGGS, M. D., 6 N. Beaumont St., St. Louis, Mo. 
ANTED—THE Microscorpt, Vol. 38, No. 1; Vol. 4, No. 3; Vol. 5, Nos. 4, 5; Vol. 6, Nos. 1> 
9; Vol. 7, Nos. 5, 7, 8, 9. 
CINCINNATI LANCET AND CLINIC, 199 West 7th Street. 
OR EXCHANGE —A new and clean copy of Stowell’s Manual of Histology—last edition. 
Wanted—Second-hand copy of Beale’s ‘‘How to Work with the Microscope.”’ Also, first- 
class slides of the orange tree insect. to exchange for diatoms in tubes. 
B.S. CONTANT, Hawk’s Park, Volusia Co., Florida, 
