PROCEEDINGS. 
493 
Mr. Bigelow read a paper entitled Results of recent explora¬ 
tion of the upper atmosphere. [Not published.] 
Mr. Littlehales read a paper entitled Possible methods of 
measuring the resultant of the centrifugal and gravitational 
forces on the ocean. [Not published.] 
Discussed by Messrs. Page, Tittmann, Bigelow, Marvin, 
Wead, and the author. 
509th Meeting. December 23, 1899. 
TWENTY-NINTH ANNUAL MEETING. 
President Tittmann in the chair. 
Twenty-two members present. 
The minutes of the Twenty-eighth Annual Meeting were read 
and adopted. 
The annual report of the Secretaries was read and accepted. 
ANNUAL REPORT OF THE SECRETARIES FOR 1899. 
Washington, D. C., December 28, 1899. 
To the Philosophical Society of Washington: 
The Secretaries have the honor to submit the following annual 
report: 
The number of active members at date of last report was 115. 
Of this number 4 have died, 2 have resigned, and 2 were trans¬ 
ferred to the absent list, making a total loss of 8. The gain has 
been: By election of new members, 5; by transfer from the 
absent list, 2, making a net loss of one. The present active 
membership is 114. 
The number on the absent list at date of last report was 79. 
This number remains unchanged. 
The list of deceased members is : 
William Whitney Godding. Edivard Goodfellow. 
William Lawrence. Nathan Smith Lincoln. 
