426 PROCEEDINGS OF THE AMERICAN ACADEMY 



Anatole Francois Hiie, Marquis de Caligny, of Versailles, 

 to be a Foreign Honorary Member in Class I., Section 4, in 

 place of the late Rudolph Julius Emmanuel Clausius. 



The Rumford Committee, through its chairman, Professor 

 Lovering, submitted the following report : — 



The Rumford Committee recommend to the Academy an 

 appropriation of $100 to Professor E. Hall to enable him to 

 make certain investigations as to the fluctuations of tempera- 

 ture which occur at the inner surface of the cylinder of a 

 steam-engine in operation. 



They also recommend an appropriation of $250 from the 

 same fund to Professor C. C. Hutchins, of Bowdoin College, 

 for the purchase of a large parabolic mirror of glass and its 

 mounting to be used for the completion of his investigation 

 on Lunar Radiation. 



The report of the committee was adopted, and the appro- 

 priations voted. 



The following papers were read : — 



Experimental Proof of Newton's Law of Cooling as ap- 

 plied to Thermometers and to Rectangular Bars of Metal. 

 By William A. Rogers. 



Experimental Proof that the Relative Coefficient of Expan- 

 sion between Brass and Steel is Constant between the Limits 

 of —5° Fahr. and +100° Fahr. By William A. Rogers. . 



Professor Charles R. Cross read a paper entitled " On the 

 Relation of the Candle-Power of Incandescent Electric Lamps 

 to Current, Potential Difference, and Energy consumed in 

 them." By L. A. Ferguson and D. A. Center. 



Professor Benjamin O. Peirce presented the following 

 papers by title : — 



On Lunar Radiation. By C. C. Hutchins. 

 • On the Charging of Condensers by Galvanic Batteries. 

 By B. O. Peirce and R. W. Wilson. 



