OF ARTS AND SCIENCES. 426 



Seven huiiilred and foi-ty-flrst Meeting. 



May 11, 1881. — Monthly Meeting. 



The President in the chair. 



Mr. Arthur Searle presented a communication on the zodi- 

 acal light. 



Professor Josiah P. Cooke made some remarks on Prout's 

 LaAV, and presented the following papers by students in the 

 Chemical Laboratory of Harvard College : — 



" On the Atomic Weight of Copper." By G. M. Hyams. 



" On the Atomic Weight of Cadmium." By O. W. Hunt- 

 ington. 



