2 he American Naturalist. 



[April, 



Professor F. E. Nipher gave an account of the Geissler and Crookes 

 tubes and the radiant phenomena exhibited by each when used in 

 connection with a high-tension electrical current of rapid alternation, 

 and detailed the recent discoveries of Professor Rontgen, showing that 

 certain of the rays so generated are capable of affecting the sensitized 

 photographic plate through objects opaque to luminous rays. Atten- 

 tion was also called to the experiments of Herz and Lodge with dis- 

 charges of very high tension alternating currents, which showed that 

 by the latter certain invisible rays are produced, which, like the Ront- 

 gen rays, are capable of passing through opaque bodies, such as pitch, 

 but differing in their refrangibility by such media. 



March 2d.— Mr. F. W. Duenckel presented a comparison of the 

 records of the United States Meteorological Observatory, located on the 

 Government building in the city, with the record for the Forest Park 

 station, showing that the daily minimum averaged decidedly lower at 

 the Forest Park station than in the city, while the wind averaged de- 

 cidedly higher for the city station. 



Professor E. E. Engler spoke on the summation of certain series of 

 numbers.— William Trelease, Recording Secretary. 



SCIENTIFIC NEWS. 



The Journal of Comparative' Neurology, which is now entering upon 

 its sixth volume, has its editorial facilities considerably enlarged by 

 the addition to the staff of Dr. Oliver S. Strong, of Columbia College. 

 Professor C. L. Herrick continues as Editor in-Chief. The Managing 

 Editor for 1896, is C. Judson Herrick, to whom business communica- 

 tions should be addressed at Denison University, Granville, O. Edi- 

 torial communications may be sent to either of the three editors. 



