EXCHANGES. 



(Exchanges are inserted icithoul charge Subscribers having microscope apparatus for sale or 

 exchange can announce the same without charge. ) 



FOR EXCHANGE— Mammoth Atlas of Human Anatomy, 15 parts, unbound, by Drs. Vesterrel- 

 gherand Erdl. Cost me 833.75. Will exchange for s.'O wort Ii of accessories or objectives. 



DK. C. H. LOVEWELL, Englewood, ill. 



FOK SALE— Microscopic stains of all kinds, loots, per oz. Also, injecting and hardening fluids, 

 and Leibeis Carmine gelative SI. 00 per oz. Address, 



RUSSELL ELLIOT, P. O. box 1216, Bradford, Pa. 



FRESH WATER ALGiE, very numerous species, including Volvox in abundance, Desmids of 

 all kinds, Draparnaldla, Rivalaria, Anabaena Tetraspora &c. , &c. 



J. M, ADAMS, Watertown, N. Y. 



FOR EXCHANGE -Eleven varieties of unmounted Starches (including Calabar Beans, Kinder. 

 Calchicum, Tous les Mois, etc.,) for one mounted slide objects pertaining to vegetable histology 

 preferred. C. E. BOOl'H, 278 Greenwich St. X. V. City. 



FOR SALE— or exchange Pollen or slides of the same— Double stained veg table sections or slides 

 of the same. J. B. BECK. Liberty, Tioga Co., Pa. 



SEEDS of Orttlocarpus Purpurasceus and slides of same in exchange for other objects mounted 

 or unmounted. EDWAED GRAY, M. D., Benlcla, California. 



WANTED— Well cleaned and selected Foramenifera for which cash will be paid or slides given. 

 EDWARD G. DAY, Riverside, Conn. 



DIATOMACEOUS Earth from Denver, Colo., In exchange for mounting material. 

 H. B. CHAMBERL1N, box 1597, Denver, Colo. 



WANTED— Microscope stand and microscopical books and journals. Will give various articles 

 or cash for same. Send for list. C. VON EIFF, Jr. 347 Greenwich St. , New York City. 



FOR EXCHANGE— A good refracting telescope 2M In. operture which will resolve Epsilon Lyra 

 with half inch eye piece— value Sti5, will exchange for a first-class l'.auseh & Lomb objective. 



J. E, WHITNEY, Rochester, N. Y. 



WANTED.— Diatoms on Algae or in muds from all the tropical sea shores, especially from 

 Puget Sound, Pensacola, Campeaeh Bay, Tampa Bay, and fossil earths from Petersburg, 

 Popleine, Virg. Rappahanock ClifT, Piseataway. New and old Nottingham, .Maryland. Will give 

 cash or beautiful diatom material from Europe in exchange. 



J. C. R1NNBOCK, Wien, Simmering 14, Austria. 



WILL exchange mounted slides of various minerals (native crystals), and others, for well 

 mounted slides. WILL H. OLMSTED, Syracuse, N. Y. 



EXCHANGE.— Parties having diatomaceous earths or other microscopical material, prepared or 

 crude, for exchange, please communicate with M. A. BOO'lI-I, Longmeadow. Ms88. 



I HAVE for exchange Stellate Hairs of Plants, Pollen, and Seeds; also various Diatoms. Polycis- 

 tina, etc.. and a variety of other goud objects, all well mounted. W. FAR NELL, Macon, Ga. 



HISTOLOGICAL and Pathological Slides to exchange for other good slides. 

 F. F. COL WELL. Urbana, Ohio. 



FOR SALE.— A copy of Prof. Leidy's great work on the Rhizopods has been left at this office for 

 sale. Pr ice, $7.50. C. H. STOWELL. 



I WILL exchange good histological for other first-class mounts. 

 S . G. SHANKS, M.D.. 547 Clinton Avenue, Alba n y, N.Y. 



HISTOLOGICAL SLIDES, very thin and evenly cut, well mounted and well ringed, will be ex- 

 changed for Pathological or Histological slides only 



H. L. WHITNEY, M.D., German Hospital, Philad elph ia, Pa. 



PLEASE announce that I will supply labels, cards, and other first-class printing in exchange for 

 good slides. EUGENE P1NCKNEY, Dixon. 111. 



ACARI INSECTS, pathological and other well mounted slides, in exchange for Pleurosigma, 

 Trichina, Diatoms, Stained Bacteria, etc. J. O. S TILLSON, Indianapolis, Indiana. 



FOR SALE. —Slides, double stained, of Bacillus Tuberculosis, 50c. each. 

 DR. W. R. CHIT TICK, 83 Lafayette Avenue, Detroit, Mich. 



WANTED.— Books treating on microscopical and histological subjects not already in my posses- 

 sion. Will pay cash, or give slides in exchange. State name of the work, date of issue, and 

 price, C. H. STOWEL L, An n Arbor, Mich. 



AMPHIPLEURA PELLUCIDA, or any other test diatom, mounted in the new medium, having 

 refractive index of 2.4, can be procured from fl. H. CHASE, M.D.. Geneva, N.Y. 



I WILL SEND a quantity of good diatomaceous material containing Bacillarla Paradoxa— all liv- 

 ing—in exchange for well mounted slides. JAS. C. LA THR OP. Bridgep ort . Conn. 



PATHOLOGICAL, Histological, and other well mounted slides will be exchanged for mounted 

 specimens of interest. Lists furnished on application. 



D. E. HAAG, M.D,, Liberty Center, Henry County, Ohio. 



