508 PROCEEDINGS OF THE AMERICAN ACADEMY 



2d. On a Standard of Light. By Prof. Trowbridge. 



3d. On the Effect of Extreme Temperatures on the Strength 

 of Magnets. By Prof. Trowbridge. 



4th. On the Electrical Control of Equal Temperature, &c. 

 By Prof. W. A. Rogers. 



5th. On Diy-Plate Photography. By Mr. W. H. Pickering. 



The results which have been reached in these researches 

 have been communicated to the Academy during the year, 

 and will appear in fuller detail in the forthcoming volume of 

 Proceedings. 



The Academy appropriated for the use of the Rumford 

 Committee $1,000. Of this sum only $431.16 has been paid 

 out b}^ the Treasurer. 



In this, as in former years, the income of the Rumford 

 Fund has also been useful in relieving the general fund. It 

 contributed $428.18 towards the payment of the printing of 

 Vol. XIX. of Proceedings, and $142.64 for the purchase of 

 books or journals relating to light or heat. 



In conclusion, the Rumford Committee recommend an 

 appropriation of $1,000, to be expended for researches on 

 light or heat, with the understanding that the unexpended 

 balance of last year, viz. $568.84, remains in the hands of 

 the Treasurer. 



All which is respectfully submitted, 



Joseph Lovering, Chairman. 



Boston, June 10, 1885. 



In accordance with the recommendation of the Rumford 

 Committee, it was 



Voted, To appropriate the sum of one thousand dollars 

 ($1,000) from the income of the Rumford Fund to be ex- 

 pended for researches on light or heat. 



The following paper was presented: — 



On the Influence of Magnetic Stress upon the Capacity of 

 an Electric Condenser. By Alonzo S. Kimball. 



The following papers were presented by title : — 



Photography of the Corona without an Eclipse. By Wil- 

 liam H. Pickering. 



