268 
On motion, the Secretaries were authorized to print the 
8° plate, accompanying the memoir, drawn and published in 
the Proceedings. 
Dr. Cresson communicated the analysis of a specimen of 
coal from Pulaski county, Va., which he exhibited and dis- 
cussed with other members present. 
Prof. Chase announced that at the request of Mr. Hall he 
had sought and found a harmonic series which exactly 
adapted itself to the radii of the observed orbits of Deimos 
and Phobus, to the radius of Mars, and to the centre of oscil- 
lation in Mars, and gave the correspondence of the theoreti- 
eal and observed numbers on the black board. 
Permission was given the Secretaries to report their Coal- 
slack advertisement at the next meeting. 
Pending nominations 839, 840, 841 and 842 were read, and 
839 ballotted for. 
On scrutiny of the ballot boxes the election of Mr. W. B. 
Taylor, of the Patent Office, Washington, D. C., was 
announced by the Chairman. 
Stated Meeting, November 2, 1877. 
Present, 16 members. 
Vice-President Mr. Prick in the Chair. 
A letter accepting membership was received from Mr. 
Wm. B. Taylor, dated Washington, D. C., October 26, 1877. 
Letters of acknowledgment were received from the New 
Zealand Institute, Wellington, September 7, 1877 (Trans. 
@:8., Lto V1; N.8.,; 1 to XY, and V4. ee Proes Va 
to XVI, except No. 96); from the Lond. Soc. of Antiquaries, 
October 9, 1877 (99); and the R. 8. Edinboro’, October 
18, 1877 (99). 
A letter of envoy was received from the Central Physical 
Observatory at St. Petersburg, September, 1877. 
A letter requesting No. 88 was received from the R. In- 
