RECOUDS OF MEETINGS. 603 



A wish has frequently been expressed for a complete list of persons to 

 whom the Rumford Premium has been awarded, and to meet this desire 

 such a list is appended to the present report. 



Papers embodying the results of researches conducted wholly or 

 in part by the aid of grants from the Rumford Fund as follows 

 have been printed during the past year in the Proceedings of the 

 Academy. 



" On the Thermal Diffusivities of Different Kinds of Marble," by 

 B. O. Peirce and R. W. Willson. 



" On the Thermal and Electrical Conductivity of Soft Iron," by 

 Edwin H. Hall. 



" False Spectra from the Rowland Concave Grating," by Theodore 

 Lyman. 



" A Study of Growing Crystals by Instantaneous Photomicrography," 

 by Theodore W. Richards and Ebenezer H. Archibald. 



In accordance with a vote of the Committee passed Nov. 10, 1897, all 

 persons receiving grants from the Rumford Fund are expected to 

 present an annual report of the progress of their work. In response 

 to the usual request such reports have been received from the following 

 persons, regarding their several researches as stated below : — 



Mr. Arthur L. Clark, on the molecular properties of vapors in the 

 neighborhood of the critical point. 



Professor Henry Crew with Mr. 0. H. Basquier, on electric arc 

 spectra. 



Professor Edwin B. Frost, on the spectroscopic determination of the 

 radial velocities of stars. 



Professor Edwin H. Hall, on the thermal properties of iron. 



Professor George E. Hale, on the application of the radiometer to 

 the study of the infra-red spectrum. 



Professor Frank A. Laws, on the thermal conductivity of metals. 



Professor Edward L. Nichols, on the visible radiation from carbon, 

 accompanied by a paper for presentation to the Academy embodying the 

 result of his researches. 



Mr. C. E. Mendenhall, on the hollow bolometer. 



Professor Edward C. Pickering, on the determination of the light of 

 very faint stars. 



Professor Theodore W. Richards, on (a) the photographic study of 

 growing crystals; (b) the transition temperatures of salts as fixed points 

 in thermometry ; (c) the experimental study of the Joule-Thomson 

 Effect. 



