PROCEEDINGS. 
359 
Mr. L. J. Briggs presented a Report on progress in elec¬ 
tricity. [Not published.] 
521st Meeting. October 13, 1900. 
President Sternberg in the chair. 
Thirteen persons present. 
Mr. Tittmann spoke informally on The provisional boundary 
between Alaska and the British possessions at the head of Lynn 
Canal, describing the line, relating some of the local tales in 
regard to it and incidents connected with the work of marking it. 
Mr. T. J. J. See read a paper on The system of Uranus. It 
comprised a statement of some recent results of observation, a 
comparison of these with former results and a critical statement 
of the large uncertainties involved in our present knowledge of 
the subject. [Not published.] 
The paper was discussed by Messrs. Baker and Manly. 
Mr. A. Martin presented A method of computing the 
logarithm of a number without making use of any logarithm 
but that of 10 or some power of 10. [Published in Compte 
Rendu du deuxieme Congres international des Mathematiciens, 
Paris, 1900, pp. 231.] 
522d Meeting. October 27, 1900. 
President Sternberg in the chair. 
Twenty-nine persons present. 
Mr. Gore spoke informally concerning the Progress of the 
operations for the measurement of a terrestrial arc in Spitz- 
bergen. He stated that the two parties of Russian and Swedish 
observers engaged in the work had made considerable progress 
during the summer of 1899, but during the summer of 1900 ex¬ 
traordinary physical difficulties were encountered, and the prob¬ 
ability is that the work will take five or six summers. 
Mr. F. H. Bigelow read a paper entitled Some results of the 
eclipse observations of May 28, 1900, which comprised a discus- 
