OP ARTS AND SCIENCES. 473 



Six hundred and seventy-seventh Meeting. 



February 9, 1 875. — Monthly Meeting. 



The President in the chah\ 



The President announced the death of Dr. Charles G. 

 Putnam, Resident Fellow. 



It was voted to refer to the Council the letter read at the 

 last meeting from the President of the Geographical Society. 



Professor N. .S. Shaler presented a communication on the 

 Freezing of Water in Bomb-shells. 



Six hundred and seventy-eighth Meeting. 



March 9, 1875. — Monthly Meeting. 



The President in the chair. 



The Corresponding Secretary read a letter from the Royal 

 Institution of Civil Engineers of Ireland, inviting an ex- 

 change of publications ; also, a letter from the Royal Acad- 

 emy of Brussels, inviting subscriptions to a monument in 

 honor of Quetelet ; also, letters from Messrs'. Hill, James, 

 and Greenough, acknowledging their election as Fellows of 

 the Academy ; also, letters from James Clerk Maxwell, of 

 Carabridoe, Enoland, and Jean Leon Ger6me, of Paris, ac- 

 knowledging their election as Foreign Honorary Members. 



The President announced the death of Sir Charles Lyell, 

 Foreign Honorary Member. 



The President announced that the letter from the Geo- 

 graphical Society of Paris had been considered by the 

 Council ; and, in accordance with their recommendation, it 

 was voted to accept the invitation of the Society, and Hon. 

 R. C. Winthrop was appointed to represent the Academy at 

 the ensuing Congress, 



Mr. C. S. Peirce presented a paper on " Photometric 

 Measurements of the Stars." 



Professor John Trowbridge presented, by title, a paper on 

 the " Effect of Heat upon the Magnetic Susceptibility of 

 Soft Iron," by H. Amory and F. Minot. 



