EXCHANGES. 



{Exchanges are inserted without charge. Subscribers liaving microscope apparatus for sale or 

 exchange can announce the same without charge. ) 



WANTED— One copy of each of the following numbers of Phln's Journal Of Microscopy. Vol. I., 

 Nol; Vol. III., Nos. 2 and 7; Vol. IV., Nos. 5 and 8 Will give a we:l monnted and Interest- 

 ing microscopic object per copy for any of the numbers wanted. 



M. S. WIARD, New Britain, Conn. 



5 VEGETABLE slides, double-stained, new method, formulae and short process for preparing 

 them, allfor«3. J. D. BECK, Liberty, Pa. 



OR EXCHASGE— Zeitschrift fur wissenschaftliche MIkroskopie, Volume I., 1881. Would 

 prefer type-slides of diatoms in exchange. Address, 



A. B. AUBERT, Orono, Penobscot County, Maine 



FRESH WATER ALG^E, very numerous species, inclnding Vol vox in abundance, Desinlds of 

 all kinds, Draparnaldia, Rivalaria, Anabaena Tetraspora £c., &c. 



J. M, ADAMS, Watcrtown, N. Y. 



FOR EXCHANGE— Eleven varieties of unmounted starches (including Calabar Beans, Ginger, 

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

 preferred. C. E. BOO iH, 278 Greenwich St. N. V. City. 



F 0R 



J- pre 



QEEDS of Orthocarpus Purpurascens and slides of same in exchange for other objects mounted 

 •^ or unmounted. EDWARD GRAY, M. D., Uenicia, California. 



WAX TED— Well cleaned and selected Foramenifera for which cash will he paid <.r slides given. 

 EDWARD G. DAY, Riverside, Conn. 



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

 H. B. CHAM BERLIN, 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 E1FE, Jr. 347 Greenwich St. , New York city. 



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

 Popleine, Vlrg uappahanock Cliff, Plscataway. New and old 'Nottingham, Maryland. Will give 

 cash or beautiful diatom material from Europe In exchange. 



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



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

 crude, for exchange, please communicate with M. A. BOOTH, Longmeadow. M>ss. 



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

 tina, etc., and a variety of other good objects, all well mounted. W. EAKNELL, Macon, Ga. 



TTISTOLOGIC AL and Pathological Slides to exchange for other good slide_s 



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. Price, 87. oO. C. H. STOVVELL. 



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

 S. G. SHANKS, M.D., 547 Clinton Avenue, Albany, 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, Philadelphia, 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 1'ILLSON, Indianapolis, Indiana. 



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

 DR. W . R. CHITT1CK, 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. STOWELL, Ann Arbor. Mich. 



AMPHIPLEURAPELLUCIDA, 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. 



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

 ing— in exchange for well mounted slides. J AS. C. LATHROP, Bridgeport. Conn. 



ATHOLOOICAL. Histological, and other well mounted slides will be exchanged for mounted 

 specimens of interest. Lists furnished on application. 



P. E. HA AG. M.D.. Liberty Center, Henry County, Ohio. 



TTIOK SALE UK EXCHANGE— A Student .Microscope and Objectiv 



E. L. CHEESEMAN, Knowlesville. X. Y. 



PAT 

 mi 



IATOM \CEOUS Clay from this place and slides of Foraminifera and Diatoms to exchange for 



ne slides or material. E. H. RICHARDS. Woburn, Mass. 



\THOLOCIC \L, Histological and Miscellaneous Mounts, will be exchanged for mounted speci- 

 mens or materia]. H. W, WESTOVER, M. D., St. Joseph, Mo. 



