168 Tue MIcRoscope. 
EXCHANGES. 
(Exchanges are inserted without charge. Subscribers having microscope apparatus for sale or 
exchange can announce the same without charge. ) 
ANTED—Good Zentmayer Microscope Stand, Binocular preferred, none but a first class in- 
strument. M. DE BALD, 136 Goodell St. Buffalo, N. Y. 
FoR EXCHANGE.—Fiddian Microscopic Illuminator, brass injecting syringe, Dr. Seilers sec- 
tion knife, warm stage with thermometer and gas chamber, ‘* Archiv fiir Microscopische Ana- 
tomie.”* bonnd ;_in exchange for first class Polariscope, collection of thin, mounted rock sections 
or collection of minerals—would also exchange for books, geological reports, or books on 
Mineralogy, Lithology and Geology. HENRY FROEHLING, 17 ‘South 12th Street, Richmond, Va. 
FoR EXCHANGE.—Living specimens of Volvox Globator by mail for other ‘‘ raw material” or 
mounted slides. Aiso one of Queen's dollar sets of untreated diatoms. Polycystines especially 
esired. ROBT. W. WOOD, Jr., Revere St., Jamaica Plain, Mass. 
FoR EXCHANGE.—Mounted sections of injected lung of pu uinea pig. 
CHAS. BLASDALE Pyericho, Queens Co., N. Y. 
OR EXCHANGE—Mound builders relics, pottery DR HEN and Indian relics for medical books 
* and surgical instruments. NRY W. COE, Mandan, Dakota. 
PERESH WATER ALG, very numerous species, inclnding ys ox in abundance, Desmids of 
all kinds, Draparnaldia, Rivalaria, Anabaena Tetraspora &c., 
. M, DAMS, Watertown, N. Y. 
GEEDS of Orthocarpus Purpurascens and slides of same in exchange for other objects mounted 
or unmounted. EDWARD GRAY, M. D., Benicia, California. 
W ANTED—Well cleaned and selected Foramenifera for which cash will be paid or slides given. 
EDWARD G. DAY, Riverside, Conn. 
PIATOMACEOUS Earth from Denver, Colo., in exchange for mounting material. 
H. B. CHAMBERLIN, box 1597, Denver, Colo. 
1 HAVE for exchange Stellate Hairs of Plants, Pollen, and Seeds; also various Diatoms, Polycis— 
tina, etc., anda variety of other good objects, all well mounted. W. FARNELL, Macon, Ga. 
FoR SALE.—A copy of Prof. Leidy’s great work on the Rhizopods has wee ae at this office for 
sale. Price, $7.50. . STOWELL. 
if WILL exchange good histological for other first-class mounts 
S. G@. SHANKS, M.D., 547 Clinton Avenue, Albany, N.Y. 
CARI INSECTS, pathological and other well monnied slides, in exchange for Pleurosigma, 
Trichina, Diatoms, Stained Bacteria, ete. J.O. STILLSON, Indianapolis, Indiana. 
MPHIPLEURA Eee DA, or any other test diatom, mounted in the new medium, having 
refractive index of 2.4, can be procured from H. H. CHASE, M.D., Geneva, N.Y. 
DiAtTom: ACEOUS Clay from this place and slides of Foraminifera and Diatoms to exchange for 
fine slides or material. E. H. RICHARDS, Woburn, Mass. 
ATHOLOGICAL, Histological and Miscellaneous Mounts, will be oneteneed for mounted speci- 
mens or material. Hy Wwe WESTOVER, , St. Joseph, Mo. 
WwW ANTED.—A copy of No. 1. Vol. IV., The Microscope ; will give slides in exchange, or cash. 
Very Truly, HENRY FROEHLING, Richmond, Va. 
ANTED. —Unmounted material, any kind; foram- a and diatoms preferred ; will give 
good exchange. M. A. BOOTH, Longmeadow, Mass. 
fan —Good 1-4; spy glass; willexchange good pees including new Gundlach 4-10 
of 80°. - OUDERDONK, Rugby, Tenn. 
ANTED.—Micrographic Dic’ y, 4th ed. Will give Wales 1- 10: Sheer 135°. 
W i “i e _ ED. GBAY, Benecia, Cal. 
FoR) EXCHANGE—Cathcart’s ether freezing mice complete. Would prefer an injecting 
syringe. AUBERT, Orono, Penobscot Co., Maine. 
—No. 50f Vol. 2, andNo.1of Vol. 3. This journal. Who can supply? 
Vy aaa 70uD. HUMPHREY, Lawrenes, aaa 
OR EXCHANGE—A new mechanical finger for a copy of Beale or Carpenter; slide of grouped 
diatoms for French objective, 14 in. focus. HAROLD PLOWE, 136 High St., Peoria, Ill. 
EXCHANGE OR SALE--Wood sections, spc oF unmounted. Also few mounts of 
Ae ts washed diatoms. . RICHARDS, Sadsburyville, Pa. 
ANTED—Micro- dictionary, 1 in. objective, accessories, rare diatoms, etc., for rare and ordi- 
nary slides. Please exchange lists. R. E. Wood, St. Helena, Napa Co., Cal. 
