Ixxvi 



showed the currents inflected upon themselves with the negative halo at 

 both terminals. An electro-motorj apparatus was then supplied with 

 tubes and connected with the batteries, one for propulsion, the other for 

 illuminating the tubes, when beaut^iful figures of revolving light shone 

 with great brilliancy of tints Some tubes filled with oxygen had by re- 

 peated use permitted the oxygen to combine with the metal of the elec- 

 trodes and become so vacuous that even the strongest battery power was 

 unable to force a passage and illuminate the tube, showing that the pres- 

 ence of matter is necessary for the transit of the oscillations of the forces 

 of light and electricity. 



Prof. W. B. Potter, Messrs. E. O. Schwagerl, John H. Terry, 

 James Player, Tra Terry, H. M. Thompson, J. B. Carson, W. C. 

 Glasgow, E. F. Aehle, and Dr. Walter Coles, were elected asso- 

 ciate members 



February 19, 1872. 

 Dr. Engelmann, Vice-President, in the chair. 



Twenty-nine members present. 



Correspondence and exchanges received were reported by the 

 Corresponding Secretary. 



Dr. Wislizenus read an abstract of his observations on Atmos- 

 pheric Electricity during the past year, and compared the results 

 for the year with the average of the past ten years as observed 

 by him. 



On motion of Mr. Conant, a committee, consisting of Messrs. 

 Reber, Riley, and Green, was appointed by the chair to take into 

 consideration a thorough revision of the Constitution and By- 

 Laws of the Academy. 



Col. Henry Pomeroy, Messrs. J. R. Meeker, W. H. Pulsifer, 

 J. K. Cummings, Hon. Henry T. Blow. Colonel Cook, and 

 Messrs. R. B. Bonner, and Gerard B. Allen, were elected asso- 

 ciate members. 



March 4, 1872. 



The President in the chair. 



Seventeen members present. 



The Auditing Committee reported that they had examined the 

 accounts of the Treasurer for the last year and found them cor- 

 rect, and their report was approved. 



