i8 THE RUMFORD FUND 



on transparency and steadiness of the air and on 

 the changes in temperature on the planet Mars. 

 (Appropriation not called for) $500 



1894. FRANK A. LAWS. Thermal conductivity of metals 300 

 EDWARD L. NICHOLS. Radiation from carbon at 



different temperatures 250 



1895. EDWIN H. HALL. Thermal conductivity of metals 250 

 ARTHUR G. WEBSTER. Velocity of electric waves . 250 

 BENJAMIN O. PEIRCE. Thermal conductivities of 



poor conductors 250 



1896. HENRY CREW. Electric, chemical, and thermal 



effects of electric arc 400 



ROBERT O. KING. Thomson effect in metals ... 100 



1897. ARTHUR G. WEBSTER. Velocity of light. (Appro- 



priation not called for) 500 



GEORGE E. HALE. Construction of spectro-helio- 



graph 400 



ARTHUR G. WEBSTER. Construction of revolving 



mirror 250 



ARTHUR G. WEBSTER and ROBERT R. TATNALL. 



The Zeeman effect 100 



1898. WALLACE C. SABINE. Researches on ultra-violet 



radiation 400 



ALBERT A. MICHELSON. New form of diffrac- 

 tion grating. (Echelon spectroscope) .... 500 

 THEODORE W. RICHARDS. For the construction of 

 a microkinetoscope, to be applied to a study of 

 the birth and growth of crystals 200 



1899. WALLACE C. SABINE. Further researches on ultra- 



violet wave-length 200 



HENRY CREW. Spectrum of the electric arc . . . 200 

 ARTHUR G. WEBSTER. Distribution of energy in 

 various spectra studied by means of the Michel- 

 son interferometer and the radiometer. (Appro- 

 priation not called for) 200 



