64 Tue 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. 
OR SALE CHEAP—Bunsen’s Spectroscope, cost $75. For description and price, 
address H. 8S. JEWETT, M. D., 215 Ludlow St., Dayton, Ohio. 
ANTED—TaueE Microscope, Vol. I complete ; Vol. Il complete; Vol. III, Nos. 5 and 6; 
Vol. IV, Nos. 2,3,4,5,8 and 9. Address 
PROF. H. M. WHELPLEY, St. Louis, Mo. 
INEKALS AND ROCKS from Utah and adjoining regions; fine nodules, some polished 
and others rough; concretionary limestone, etc. In exchange for good miscella- 
neous mounts. Address 
PROF. J. E. TALMAGE, 32 Centre St., Salt Lake City, Utah. 
Duros EXCHANGED, or cleaned on shares. 
Cc. S. BOYER, Elm, Camden Co., N. J. 
ee Vol. IV, Nos. 8and 9. Address this office. 
; aa SALE CHEAP —112 blue prints, plates of diatoms. Correspondence solicited. 
F. L. CAUCH, Dental College, Cincinnati, Ohio. 
ATED — 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 specimers (300), for a 
good microscope. Address H. A. MUMAW, M. D., Orrville, Ohio. 
wr EXCHANGE histological slides for other interesting slides. 
A. F. BARNARD, Box 152, Oberlin, Ohio. 
5 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 GQnarine 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. 
ANTED 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. HOYT, 154 Howard St., Detroit, Mich. 
AN HAIRS—First-class mounts, to exchange for diatoms and other fairs. 
Lists exchanged. W.J. MARTIN, Davidson College, N. C. 
OR SALE OR EXCHANGE FOR OTHER BOOKS—A complete set—90 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 Microscorg: 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. 
1 ees 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 one 
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 inch, 
Guiiffith’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. 
mechanical stage, perfectly new. 
WM. N. BEGGS, M. D., 6 N. Beaumont St., St. Louis, Mo. 
