1895.] MICROSCOPICAL JOURNAL. 399 



MICROSCOPICAL SOCIETIES. 



San Francisco, Cal.— W. E. Loy, Secretary. 



September 4, 1895. — Prof. W. E. Ritter gave an account of his 

 year's leave of absence granted him by the Regents of tlie Uni- 

 versit}' of California, and which he had spent in Europe, par- 

 ticularly at the Biological Laboratory at Na])les. He had also 

 spent much time with the Marine Biological Association of 

 Liverpool. 



Dr. Eisen exhibited a slide of blood corpuscles of the black 

 Salamander, stained by the Haidenhaim method. The prepara- 

 tion had been mounted in a new medium prepared by Charles 

 C. Reidy, — bisulphide of carbon and gum thus This medium 

 is of very high refractive index, and gave a brilliancy of color 

 and perfection of outline not produced by any otlier medium 

 the doctor had used. 



October 2. — The principal feature of the meeting was a paper 

 by Melville Attwood, a mining expert on some simple modes by 

 which the external characters alone are used for distinguishing 

 mineral substances. The reading of the paper was illustrated 

 by an exhibit of much interest. 



October 16. — A. conversational meeting was held at the rooms 

 432 Montgomery street, JohnC. Spencer, M.D., president, in the 

 chair. M. J. Rosenau, M. 1)., of the United States marine hos- 

 pital service, Washington, D: C, read a paper on Immunity 

 and Immunization. 



Washington, D. C. 



October 8, 1895. — The first meeting of the season after the sum- 

 mer vacation was devoted to the election of officers and the dis- 

 cussion of plans for the winter's work. 



Leavenworth Academy of Science. 



October 26, 1895. — There has been re-organized in Leaven- 

 worth, Kansas, the " Leavenworth Academy of Science " an or- 

 ganization that was chartered under the laws of the State of 

 Kansas, on October 3, 1873, but that had lapsed some ten years 

 ago. 



The different departments of science are assigned to sections 



