188 The Microscope. 



Dr. Brown-Sequard has just been elected president of the 

 Societe de Biologie, to serve for five years. 



The April number of Pelletan's Journal de Micrographie con- 

 tains an admirable portrait of Prof. Mathias Duval. 



The Rochester, N. Y., Post- Express, of April 5th, gives a column 

 account of the Gundlach optical works of that city, which is very 

 interesting reading. 



Professor Ernest Haeckel, of Jena, has been studying the 

 lower forms of animal life in the Levant, during the past winter. 



The marine laboratory of the John Hopkins University has been 

 opened at Nassau, New Providence, West Indies, under the direction 

 of Dr. W. K. Brooks. 



A new departure is the use of the polariscope in the detection of 

 adulterations in essential oils. Mr. Albert M. Todd gives an inter- 

 esting sketch of his experiments in this line in the American Jour- 

 nal of Pharmacy for April. 



Prof. Neariani Semnola, Professor of Experimental Therapeutics 

 in the University of Naples, will deliver a general address before the 

 Ninth International Medical Congress at Washington, on Bacteri- 

 ology and its clinical therapeutics. — No. W. Medical Gazette. 



Professor Alexander Agassiz, director of the museum of 

 zoology at Harvard, has been made a D. Sc. by the University of 

 Cambridge. In introducing him, the public orator refeiTed to him 

 as one of whose work it might be said, ' Merses profunda, pulchrior 

 evenit.' The allusion was to Prof. Agassiz' investigations of the 

 mysteries of the ocean. — Science. 



Dr. E. Klein, who found a micrococcus in the matter from the 

 ulcers of a sick cow, to the milk of which a scarlet-fever epidemic 

 was attributed, has now discovered a similar form in the blood of 

 scarlet-fever patients. Inoculation of mice with the micrococcus 

 from each source gave the same results. If this micro-organism is 

 found to be the cause of the disease or earner of the contagion, its 

 discovery is hardly second in importance to that of the B. tuberculo- 

 sis, or the comma bacillus. 



The tenth annual session of the Martha's Vineyard Summer 

 Institute will begin July 11, and continue for five weeks. Among 

 the courses announced we notice the following : Mr. Edward S. 

 Burgess, on botany ; Geology and Mineralogy, by Profs. W. A. 

 Brownel and A. E. Furner ; Microscopy, by Eev. J. D. King and 

 Miss Ella M. Drury ; Zoology, Prof. William B. Dwight. Full in- 

 formation of these courses, which are admirably adapted to the 

 needs of teachers during vacation, may be had by applying to Mr. 

 B. W. Putnam, business agent, Jamaica Plain, Boston, Mass. 



