392 PROCEEDINGS OF THE AMERICAN ACADEMY. 



December 8, 1920. To Professor Percy W. Bridgman of the 

 Jefferson Physical Laboratory, for his researches on the Thermal 

 and Optical Properties of Bodies under high pressures; Addi- 

 tional to former appropriation (231) $400 



March 9, 1921 . To Professor Paul F. Gaehr of Wells College 

 for his research on the specific heat of tungsten (232) .... 250 



April 13, 1921. To Professor Alpheus W. Smith of Ohio 

 State University for his researches on the Hall, Nernst and allied 

 Effects ; Additional to former appropriation (233) 200 



May 11, 1921. To Professor Leonard R. Ingersoll, of the 

 University of Wisconsin, for his research on Magnetic-Rotation 

 Dispersion, particularly of invisible Radiations; Additional to 

 former appropriation (234) 200 



The grants made by the Rumford Committee from the beginning 

 have been numbered consecutively. These numbers are given for the 

 above-mentioned . 



Reports of Progress in their respective researches have been received 

 from the following persons: C. G. Abbot (research finished), W. M. 

 Baldwin (research finished), R. T. Birge, P. W. Bridgman, W. W. 

 Campbell, A. L. Clark, H. Crew (research finished), F. Daniels, 

 P. F. Gaehr, R. C. Gibbs, H. P. Hollnagel, H. L. Howes, L. R. Inger- 

 soll, N. A. Kent, F. E. Kester, F. G. Keyes, C. A. Kraus, E. Kremers, 

 R. A. Millikan, C. L. Norton, F. Palmer, Jr., J. A. Parkhurst, H. M. 

 Randall, T. W. Richards, F. K. Richtmyer, F. A. Saunders, W. O. 

 Sawtelle, A. W. Smith, B. J. Spence, L. S. E. Thompson, O. Tugman, 

 F. W. Very, A. G. Webster, D. L. Webster, F. G. Wick, R. W. Wood. 



The following papers in the Proceedings have been published with 

 aid from the Rumford Fund since the presentation of the last Report 

 of this Committee. 



Specific Heat of Ammonia. H. A. Babcock, Vol. 55, No. 6. 



Ghosts and Oculars. Louis Bell, Vol. 56, No. 2. 



Electrical Resistance under Pressure including certain liquid metals. 

 P. W. Bridgman, Vol. 56, No. 3. 



Researches aided from the Rumford Fund. 1832-1920. Compiled 

 by Charles R. Cross will appear shortly. 



Charles R. Cross, Chairman. 

 May 11, 1921. 



