THE RUMFORD FUND 19 



EDWIN B. FROST. To aid in construction of a 

 spectrograph especially designed for the meas- 

 urement of stellar velocities in the line of sight 8500 



1900. EDWARD C. PICKERING. For constructing a new 



type of photometer to be used in an investiga- 

 tion on the brightness of faint stars, to be 

 carried out by co-operation with certain observa- 

 tories possessing large telescopes 500 



THEODORE W. RICHARDS. Transition temperatures 



of crystallized salts 100 



ARTHUR L. CLARK. Molecular properties of vapors 



in the neighborhood of the critical point . . . 250 



CHARLES E. MENDENHALL. Investigations on a 



hollow bolometer. ($100, only, called for) . . 200 



GEORGE E. HALE. Application of the radiometer 

 to the study of the infra-red spectrum of the 

 chromosphere 500 



ARTHUR A. NOYES. Effect of high temperatures 



on the electrical conductivity of salt solutions. 300 



1901. THEODORE W. RICHARDS. Research on the ex- 



pansion of gases 500 



HENRY CREW. Order of appearance of the differ- 

 ent lines of the spark spectrum 100 



ROBERT W. WOOD. Anomalous dispersion of sodium 



vapor * ... 350 



ARTHUR G. WEBSTER. For purchase of fluorite plates 65 



1902. ERNEST F. NICHOLS. For the purchase of a spec- 



trometer, in furtherance of a research on resonance 



in connection with heat radiations 300 



THEODORE W. RICHARDS. For the construction of 

 a mercurial compression pump to be used in a 

 research on the Joule-Thomson effect. (Appro- 

 priation subsequently transferred to another re- 

 search, viz., the experimental study of chemical 

 thermodynamics) 750 



