418 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
574th Meeting. November 21, 1903. 
President Gore in the chair. 
Twenty-three persons present. 
Mr. F. II. Bigelow spoke on Synchronism in the solar and 
terrestrial atmospheres, presenting many lantern illustrations. 
These were thought to show direct relations between the terres¬ 
trial pressure and temperature in the tropics and the variations 
in solar prominences, and inverse relations in the temperate 
zones. The distribution of the prominences was discussed and 
the constitution of the sun. [Published in Weather Bureau Bul¬ 
letin No. 316.] 
The paper was discussed by Messrs. Briggs and Marvin. 
Mr. L. A. Bauer then presented some Contributions to the 
theory of the earth’s permanent magnetism and its secular varia¬ 
tion. He showed that the energy of the earth’s magnetization 
had diminished 1/35 in 46 years; and stated as the result of 
his analysis that the principal cause of secular variation resides 
outside the earth’s crust. [Published in Journal of Terrestrial 
Magnetism, etc., vol. viii, p. 97 (1903), and vol. ix, p. 113 
(1904).] 
575th Meeting. December 5, 1903. 
Vice-President Marvin in the chair. 
Twenty-five persons present. 
Mr. James Howard Gore, the retiring President, delivered 
in the Assembly Hall of the Cosmos Club an address on The 
Geoidal figure of the earth. [Not published.] 
676th Meeting. December 19, 1903. 
THIRTY-THIRD ANNUAL MEETING. 
President Gore in the chair. 
Twenty-six persons present. 
The Minutes of the Thirty-second Annual Meeting were read 
and approved. 
The President announced the death of Mr. Marcus Baker, a 
Past President of the Society. 
