1300 
1100 
%00 
500 
Fig. 3 
to insufficient fore-cooling his conclusion remains correct, as the 
amount of the deviation of the observations from the formula even 
at the temperature of liquid air is larger than that of the deviation 
which is due to insufficient cooling. 
We endeavoured to find a simple relation between log and 
log T, which would correspond to the observations better than 
SuTHERLAND’S formula. Column 4 under #7 107 contains the values 
of y caleulated by the formula 
T \0.695 
v= (on) 
