PROCEEDINGS. 



Seven hundred and sixty-tliird Meeting. 



May 29, 1883. — Annual Meeting. 



The President in the chair. 



The Treasurer and the Librarian presented their annual 

 reports. 



The Corresponding Secretary read the annual report of 

 the Council. 



The chairman of the Rumford Committee presented the 

 following 



Report of the Rumford Committee for the year. 



Since the last report various scientific investigations have been 

 instituted by the Committee as follows : — 



I. Experiments in photographing the solar spectrum with the 

 improved dry plates ; conducted under the direction of Professor 

 Pickering, by Mr. W. H. Pickering. The Committee have expended 

 on this account $233.56, viz. : — 



Scott's bills, S7. 75 and $iri $22.75 



French's bill 69.80 



Clark & Sons' bill 85.00 



Stevens, for labor, &c 56.01 



$333.56 



II. Experiments on the so-called Thomson effect in Thermo- 

 electricity, and related subjects ; conducted by Professor Trowbridge. 

 The Committee have expended on this account $323, viz. : — 



To Williams, for large Bunsen battery . . . $225.00 

 " *' for large adjusting coils . . . 98.50 



"$323.50 



