EXCHANGES. . 
FoR EXCHANGE—Mound builders relics, pottery gs ingeet and Indian relics for medical books 
and surgical instruments. DR. HENRY W. COE, Mandan, Dakota. 
HAVE Zentmayer’s improved centennial microscope Ea oa nee all improvements to 
date. Sameasnew. Cost $550. will sell for jig A. FIELD, Des Moines, lowa. 
ba eee One copy of Vol. I., No 1 of Phin’s Journal of Microsco yy. Will give a well 
mounted and interesting microscopic object. M. 8. WIARD, New Britain, Conn. 
ONE-TENTH immersion. adjustable obj. by Gundlach, for sale. 
HAROLD PLOWE, 136 High st., Peoria, Ill. 
WANTED—A Microsteriopticon in cmonenee £2 e fora Go etn: ag en Obertine ae 
Pes ashington Aye., Detro 
FOR EXCHANGE-—A Hartnack 1-11 Beeeyes = 70°. Will exchange for a good low power sae 
. MOORE, 67 Euclid Ave., Cleveland, Ohio. 
FOR EXCHANGE—One Fiddian Microscopic Illuminator, one Brass injecting Syringe with four 
pipes and stop cock, one Microtome (Brass) Rivet, improved, with knife, one Dr. Seilers Section 
Knife and Carrier, one warm Stage with Thermometer and Gas Chamber in exchange for first 
class Polariscope with eRe Eyepiece or collection of thin mounted Rock sections. 
DR. HENRY FROEALING, 17 South 12th street, Richmond, Va. 
OR EXCHANGE—Zeitschrift fur wissenschaftliche Mikroskopie, Volume I., 1884. Would 
prefer type-slides of diatomsinexchange. Address, 
: . B. AUBER T, Orono, Penobscot County, Maine 
FRESH WATER ALG A&A, very numerous species, inclnding Volvox in abundance, Desmids of 
all kinds, Draparnaldia, Rivalaria, Anabaena Tetraspora &c., &c. 
J. M, ADAMS, Watertown, N. Y. 
OR EXCHANGE—Eleven varieties of unmounted starches (including Calabar Beans, Ginger, 
Calchicum, Tous les Mois, ete.,) for one mouniee slide objects pertaining to vegetable histology 
preferred. 3 . BOOTH, 278 Greenwich St. N. Y. City. 
SEEDS of Orthocar pus Purpurascens and slides of same in uae for other objects mounted 
or ee EDWARD GRAY, M. D., Benicia, California. 
\ W ANTEI ANTED—Well cleaned and selected Foramenifera for which cash will be paid cr slides given. 
EDWARD G. DAY, Riverside, Conn. 
DPIATOMACEOUS Earth from Denver, Colo., in exchange for mounting material. 
H. B. CHAMBERLIN, box 1597, Denver, Colo. 
\\ ANTED. =pintoms on Algz or in muds from all the tropical sea shores, especially from 
Puget Sound, Pensacola, Campeach Bay, Tampa Bay, and fossil earths from Petersburg, 
Popleine, Virg Rappahanock Cliff, Piscataway. New and old Nottingham, Maryland. Will give 
cash or beautiful diatom material from europe in exchange. 
. RINNBOCK, Wien, Simmering 14, Austria. 
VXCHANGE. —Parties having diatomaceous ear rths or other er material, prepared or 
crude, for exchange, please communicate with M. A. BOOTH, Longmeadow. Msss. 
HAVE for exchange Stellate Hairs of Plants, Pollen, and Seeds; also various Diatoms, Polycis- 
~ tina, ete., anda variety : of other good objects, all well mounted. W. FARNELL, Macon, Ga. 
Ereroncaices and Pathological Slides to exchange for other good slides, wen Oni 
e} rbana, oO. 
For f SALE. ey copy of Prof. Leidy’s great work on the Bhizopods has Deom left at this office for 
sale. Price, $7.50. . STOWELL. 
I 7 WILL exchange good histological for other first- class mounts. 
S. G@. SHANKS, M.D., 547 Clinton Avenue, Albany, N.Y. 
PLEASE announce that I will supply labels, cards, and other first-class printing in exchange for 
good slides. EUGENE PI) CKNEY, Dixon, Lil. 
AGAR ZIT INSECTS, pathological and other well mounted slides, in exchange for Pleurosigma, 
Trichina, Diatoms, Stained Bacteria, etc. J.O. SCILLSON, Indianapolis, Indiana. 
MPHIPLEURA PELLUCIDA, or any other test diatom, mounted in the any medium, having 
refractive index of 2.4, can be procured from H. H. CHASE, M.D., Geneva, N.Y. 
WILL SEND a quantity of good diatomaceous material Ses Bacillaria Paradoxa—all liv- 
ing—in exchange for well mounted slides. JAS. C. LATHROP, Bridgeport, Conn. 
I AT OMACE ous Cc lay from this place and slides of Foraminifera and. Diatoms to exchange for 
fine slides or material. E. . RICHARDS, Woburn, Mass. 
ATHOLOGICAL, Histological and “Miscellaneous Mounts. will be exchanged for mounted speci- 
mens or material. H. W, WESTOVER, M. ioe St. Joseph, Mo. 
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