RATIO OF SPECIFtC HKATS. 



21 



The ineun value of all these data shows that the division mark 14.21 on the acid 

 manonietei' corresponds to 7.105 cm. of Hg. 



The temjjeratiiie, J^, corresponding to the resistance standards at Z, 



W« = 70-1-10-1-2+1, 



and tlie position 589 of the sliding contact of the bridge, were deduced ixora. the 

 followinoj data observed on the 10th of February : 



From these data we find by interpolation that the temperature 4.64° C corresponds 

 to the position 589 of the sliding contact. Hence the present result is 



n - 1.3989. 



Another series of experiments was made on March 16, 1894, when the lia- 

 rometer stood at 75.24 cm. Hg., and the temperature of the water l)Hth was 16.41° 

 C. The resistance standards inserted at Z\\\ the bridge were 



W^ = 70+ 10 + S-+ I + -5 + -2, 



rr. 



70 + 10 + 2 -|- I. 



The correct pressure was taken as the ecpiivalent of division mark 51.70. 

 How closely the corresponding meicury pressure has been found will l)e seen in 

 the following pressure comparisons made on successive days : 



