OF ARTS AND SCIENCES. 313 



Eight hundred and twelfth Meeting. 



May 9, 1888 — Monthly Meeting. 



The President in the chair. 



In the absence of the Recording Secretary*, Mr. Haynes 

 was appointed Secretary pro tempore. 



The Corresponding Secretary read letters from Messrs. 

 Rotch and Thomson, accepting Fellowship in the Academy ; 

 from the General Secretaries of the International Geological 

 Congress, inviting the attendance of members of the Academy 

 at the approaching meeting in London, in September; from 

 the President of the American Philosophical Society in regard 

 to a proposed international congress to consider the subject 

 of a universal language ; from the Audubon Monument Com- 

 mittee of the New York Academy of Sciences, soliciting sub- 

 scriptions ; from a committee in the Netherlands inviting 

 subscriptions to the " Donders memorial fund." 



The First Part of Volume XXIII. of the Proceedings was 

 laid on the table. 



The following papers were presented: — 



" A Note on the Atomic Weight of Oxygen." By Josiah 

 P. Cooke. 



" On the Present Condition of the Subject of Color ; to- 

 gether with an Account of Investigations at the Jefferson 

 Physical Laboratory on the Invisible Rays of Light." By 

 John Trowbridge. 



" Result of Studies of the Strength of Electric Currents 

 used in Telegraphy and in Microphones." By Charles R. 

 Cross. 



