604 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Professor Wallace C. Sabine with Mr. Theodore Lyman, on the study 

 of false spectra from the Rowland Concave Grating. 



The Committee has devoted much time to the consideration of the 

 desirability of an award of the Rumford Premium. The claims of 

 several meritorious candidates have been investigated and discussed at 

 length. As a result of these deliberations the Committee voted unani- 

 mously on Feb. 13, 1901, for the first time, and on March 13, 1901, for 

 the second time, that the Academy be recommended to award the Rum- 

 ford Premium to Elihu Thomson for his inventions in electric welding 

 and lighting. 



Chas. R. Cross, Chairman. 



Awards of the Rumford Premium. 



May 28, 1839. Robert Hare, of Philadelphia, for his invention of 

 the compound or oxyhydrogen blowpipe. 



June 1, 1862. John Ericsson, of New York, for his improvements 

 in the management of heat, particularly as shown in his caloric engine 

 of 1855. 



May 30, 1865. Daniel Tread well, of Cambridge, for improve- 

 ments in the management of heat, embodied in his investigations and 

 inventions relating to the construction of cannon of large calibre, and 

 of great strength and endurance. Presented November 14, 1865. 



June 12, 1866. Alvan Clark, of Cambridge, for his improvements in 

 the manufacture of refracting telescopes as exhibited in his method 

 of local correction. Presented February 26, 1887. 



May 25, 1869. George Henry Corliss, of Providence, for his im- 

 provements in the steam engine. Presented January 11, 1870. 



June 6, 1871. Joseph Harrison, Jr., of Philadelphia, for his mode 

 of constructing steam-boilers, by which great safety has been secured. 

 Presented January 9, 1872. 



May 27, 1873. Lewis Morris Rutherfurd, of New York, for his im- 

 * provements in the processes and jnethods of astronomical photog- 

 raphy. Presented March 10, 1874. 



May 25, 1875. John William Draper, of New York, for his re- 

 searches on radiant energy. Presented March 8, 1876. 



May 25, 1880. Josiah Willard Gibbs, of New Haven, for his re- 

 searches in thermodynamics. Presented January 12, 1881. 



May 29, 1883. Henry Augustus Rowland, of Baltimore, for his 

 researches in light and heat. Presented February 14, 1884. 



