268 MICKOSCOPICAL JOURNAL. [November. 



C. Falk exhibited a specimen tape-worm mounted in balsam, which 

 lie found to be the best medium for such objects. Dr. H. M. Whelpley 

 presented a copy of McDonald's microscopical examination of water 

 and reviewed the work quite favorably. J. B. Whitney resigned as 

 treasurer on account of leaving the city, and Wm. Ilhardt was elected 

 to fill the vacancy. 



o 



Washington, D. C. — L. M. Mooers, Secy. 

 Tuesday^ Oct. 14., i8go. — The annual election of officers resulted in 

 the choice of the following : President, Dr. Thos. Taylor ; vice-pres- 

 ident, Dr. C. H. Stowell ; corresponding secretary, Dr. J. Melvin 

 Lamb ; recording secretary, Mr. L. M. Mooers ; treasurer, Mr. J. M. 

 Yznaga ; curator, Prof W. H. Seaman. Dr. Seaman gave a brief ac- 

 count of the Detroit meeting. 



SUBSCRIBERS' NOTICES. 



[These notices will be given six insertions in this column at 25 cents per line or fraction thereof. 

 FOR EXCHANGE.— Slides of selected diatoms. D. B. WARD, Poughkecpsie, N. Y. 



OFFERED.— Diatomaceous Earth from Utah (Desert) for Histological Mounts. 



PROF. ORSON HOWARD, Salt Lake City, Utah. 



CORRESPONDENCE invited with a view to the exchange of either mounted or unmounted Oribatida 

 (British) for American species. E. BOSTOCK, Stone, Staffordshire. 



WANTED. — Any works on Microscopy not already in my Library. 



H. M. WHELPLEY, F. R. M. S., St. Louis, Mo. 



First-class Histological Slides for other good mounts ; Histological and Pathological material cut on 

 shares. S. G. SHANKS, M. D., 547 Clinton Ave., Albany, N. Y. 



WANTED. — A clean copy of WoUe's Fresh-Water Algse of the United States (2 vols.) ; also good 

 second-hand Grunow Camera-Lucida, and a sell-centering Turn-table. 



JOS. P. THOMPSON, P. O. Box 1383, Portland, Me. 



FOR SALE CHEAP. — New Gundlach j'j homogeneous- immersion objective, for n^ glycerine or 

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



FOR SALE. — Beautiful photo-micrographs of P. angulatum. Only 2=; cents each. 



J. E. BAKER, M. D., Wyoming, Ohio. 



WANTED. — Proceedings Am. Acad. Sciences, XI, 1876. 



C. W. SMILEY, Washington, D. C. 



FOR SALE OR EXCHANGE.— Mosquitoes, male and female. Price 75 cents each. Will ex- 

 change only for first-class mounts. E. W. SHARP, 2800 Richmond St., Philadelphia, Pa. 



A $s MICROSCOPE. — Made on proper scientific principles. Magnifies 100 diameters or 10,000 

 times. For other interesting articles send for list of Popular Scientific Specialties. 



G. S. WOOLMAN, 116 Fulton St., New York. 



SPECIAL BARGAIN in histological slides. 



WM. N. BEGGS, M. D., 2207 Sidney St., St. Louis, Mo. 



FOR SALE OR EXCHANGE.— Photo-micrographs of P. angulatum taken through Spencer's 

 ["b H. I., 2400 diameters. Also photo-micrographs of bacteria, diatom.s, etc., 25 cents each. Will ex- 

 change for well-mounted slides. Dr. J. E. BAKER, Wyoming, Ohio. 



