490 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Mr. Louis D. Bliss read a paper on Some applications of 
Hertzian waves. fFor an abstract see Science, 1899, June 16, 
new series, vol. ix, no. 233, p. 849.] 
Discussed by Messrs. Bigelow, Littlehales, Tondorf, May¬ 
nard, and Wear. 
Announcement was made by the President of the deaths of 
three members, viz: 
Edward Goodfellow, died May 7, 1899. 
W. W. Godding, died May 6, 1899. 
William Lawrence, died May —, 1899. 
504th Meeting. October 14, 1899. 
President Tittmann in the chair. 
Twenty-one members and guests present. 
Mr. Tittmann made an informal communication respecting 
certain statements in a French geographical magazine as to con¬ 
ditions of personal safety in Alaska. 
A paper by Mr. Lindenkohl, entitled Recent progress in ocean¬ 
ography, was read by the Secretary and discussed by Messrs. 
Page, Preston, and Tittmann. [Published in Science, 1899, 
December 1, new series, vol. x, no. 257, pp. 803-807.] 
Mr. Gore read a paper entitled The commercial relations of 
Germany and the United States. 
This gave rise to an animated discussion, participated in by 
Messrs. Watkins, Tittmann, Schoenfeld, Adler, Maynard, 
Procter, We ad, and the author. 
505th Meeting. October 28, 1899. 
President Tittmann in the chair. 
Twenty-five members and guests present. 
Informal communications were made by Artemas Martin 
on A method of extracting roots by successive subtractions [not 
