THE RUMFORD FUND 15 



1875. JOHN TROWBRIDGE. Improvement of magneto- 



electric machine and induction coil .... $500 



1876. HENRY A. ROWLAND. New determination of 



mechanical equivalent of heat 600 



SAMUEL P. LANGLEY. Researches on radiant 



energy 600 



1877. BENJAMIN O. PEIRCE, JR. Investigation of the 



conduction of heat in the interior of bodies. 



($60, only, called for) 200 



EDWARD C. PICKERING. Atmospheric refraction 520 



1878. WOLCOTT GIBBS, JOHN TROWBRIDGE, EDWARD C. 



PICKERING. Experiments on photometry and 

 polarimetry. (A small portion only of this ap- 

 propriation was called for) 500 



CHARLES A. YOUNG. In aid of observations on 

 solar eclipse of July 29, 1878. (Appropria- 

 tion not called for) 300 



NATHANIEL S. SHALER. Investigation on loss of 

 internal heat of earth in the neighborhood of 

 Boston. (Appropriation not called for) . . . 200 



WILLIAM W. JACQUES. Experiments on the dis- 

 tribution of heat in the spectrum 100 



WOLCOTT GIBBS, EDWARD C. PICKERING, JOHN TROW- 

 BRIDGE. Determination of indices of refraction. 

 (A small portion only of this appropriation was 

 called for) 500 



1879. JOHN TROWBRIDGE. Heat developed by magnetiza- 



and demagnetization of magnetic metals . . 200 

 WILLIAM W. JACQUES. Radiation at high tem- 

 peratures 200 



WILLIAM A. ROGERS. To procure a metric stand- 

 ard of length 350 



1880. SILAS W. HOLMAN. Viscosity of gases .... 250 

 WOLCOTT GIBBS. Construction of dynamo-electric 



machine of a new plan 150 



