RECORDS OF MEETINGS- 



569 



5 of which were borrowed within two weeks ; and of the 8 remaining 

 out at the last report, all have been returned except 3. 



The expenses charged to the library are as follows : Miscellaneous, 

 $506.70 (which includes $153.13 for cataloguing) ; Binding, $738.25 

 General, and $84.55 Rumford, Funds ; Periodical subscriptions, 

 $44(5.64 General, and $164.68 Rumford, Funds ; making a total of 

 $1184.89 for the General, and $249.23 for the Rumford, Funds, as the 

 cost of subscriptions and binding. 



Of the appropriation of $50 from the Rumford Fund, plus $68.86, 

 the unexpended balance from last year, $50.69 has been paid for Books 

 and binding. 



A. Lawrence Rotch, Librarian. 



May 11, 1910. 



Report of the Rumford Committee. 



The following grants in aid of researches on light and heat have 

 been made by the Rumford Committee during the year 1909-10 : — 



June 9, 1909. Professor W. W. Campbell of the Lick Observa- 

 tory, for the purchase of certain parts of a quartz spectrograph $300 



Professor M. A. Rosanoff, of Clark University, in further aid 

 of his research on the fractional distillation of binary mixtures . 200 



October 13, 1909. Professor L. R. Ingersoll, of the Univer- 

 sity of Wisconsin, for the continuation of his work on the opti- 

 cal constants of metals, additional 300 



December 8, 1909. Professor Joel Stebbins, of the Univer- 

 sity of Illinois, in further aid of his researches with the selenium 

 photometer 300 



Professor W. W. Campbell, of the Lick Observatory, in fur- 

 therance of his researches on the polariscope study of the solar 

 corona by means of a Hartmann photometer, additional . . . 125 



February 9, 1910. Professors C. E. Mendenhall, of the Uni- 

 versity of Wisconsin, and Augustus Trowbridge, of Princeton 

 University, in aid of their research on ether drift upon the inten- 

 sity of radiation 250 



Professor C. E. Mendenhall, in furtherance of a research on 

 free expansion of gases, additional 250 



Mr. Frank W. Very, for the purchase of photographic glass 

 plates of the spectrum from George Higgs, London, a sum not 

 to exceed 50 



Professor M. De K. Thompson, of the Massachusetts Institute 

 of Technology, in aid of his research on the high temperature 

 equilibrium of the system of materials employed industrially in 

 the carbide process for the fixation of atmospheric nitrogen . . 1 00 



