486 PROCEEDINGS OF THE AMERICAN ACADEMY 



The Recording Secretary was authorized to send reports of 

 the meetings of the Academy to the editor of " Nature," for 

 insertion in that journal. 



Mr. S. P. Sharpies presented a communication on the com- 

 parative purity of various sources of water-supply in the neigh- 

 borhood of Boston. 



Six Hundred and fiftieth Meeting. 



November 27,1872. — Adjourned Stated Meeting. 



i 



The President in the chair. 



The Corresponding Secretary read a letter from Mr. Sang, 

 enclosing specimen pages of a table of logarithms to nine places, 

 which was referred to the Recording Secretary. 



The President announced the death of Professor James Had- 

 ley, of New Haven, Associate Fellow of the Academy in Class 

 III., Section 4. 



The following gentlemen were then elected Resident Fellows 

 of the Academy : — 



Professor W. R. Nichols, of Boston, to be a Resident Fellow 

 in Class I., Section 3. 



Professor C. L. Jackson, of Cambridge, to be a Resident Fel- 

 low in Class I., Section 3. 



Professor C. O. Boutelle, of Cambridge, to be a Resident 

 Fellow in Class I., Section 4. 



Mr. J. M. Merrick, of Boston, to be a Resident Fellow in 

 Class I.,. Section 3. 



Mr. N. St. J. Green, of Cambridge, to be a Resident Fellow 

 in Class III., Section 1. 



It was voted to appoint a Committee on Communications, 

 consisting of Professor James M. Crafts, Dr. E. H. Clarke, 

 Professor A. Agassiz, and the Recording Secretary. 



Professor A. Agassiz presented a communication on the de- 

 velopment of Balanoglossus. 



Professor T. S. Hunt made a communication on a paper by 

 Mr. Mallet on the cause of volcanic activity. 



