Nipher — On Pressure Measurements in a Fluid Stream. 25 



The same determinations were then made for a temperature 



r=273. 



The results are given in the following table 



K 



Assuming this value of a to be a = ^pt * ^^^ value of ^is 



found to be A''= 0.6605. This is a very close agreement 

 with the value for the temperature of 20^(7. 



