(V.) Before determinin'’' the pressure coefficient for liellinn, as a considerable time had elapsed since the measurements 
C’f the coefficients for hydrogen had l)een made, the thermometer was refilled ^^'Ith hydrogen, and an Ice-j^oint and a l)oiling- 
point ^^■ere determined. 
128 
DIt U. W. TRAVEES, ME. G. SENTEE, AND DE. 
A. JAQL'EEOD 
V 
o 
a: 
OJ 03 
03 Oj 
Ji yi 
21. The Pressui'e Coeff icient of Helium. 
