1891 - 92 .] On the Thermal Effect of Pressure on Water. 135 
closely (from 0° to 10° C., which are his temperature limits) by the 
analogous expression 
^+5 
25 
The difference between the denominators of these expressions is 
not serious, and may depend upon the uncertainty of the assumed 
expansibility of water, or upon an over-correction of his results by 
M. Galopin. [He increases his observed data by 52 per cent, in 
consequence of the thermal capacity of his apparatus.] But the 
difference between the numerators seems to show once more that 
M. Galopin’s data have been over-corrected, or 'that it was scarcely 
warrantable to extend the application of my formula so far as 500 
atmospheres. 
