Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLVII. No. 1. — Mat, 1911. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL 

 LABORATORY, HARVARD UNIVERSITY. 



AN INVESTIGATION OF THE ERRORS IN COOLING 



CURVES AND METHODS FOR AVOIDING THESE 



ERRORS; ALSO A NEW FORM OF CRUCIBLE. 



By Harvey C. Hayes. 



With Six Plates. 



Inyestiqations on Light and Heat pcblished with Aid from the Rumford Fund. 



