BRIDGMAN. — WATER UNDER PRESSURE. 



457 



same for the two determinations. Furthermore, the dilatation between 

 0° and 22°, as found by taking the difference of the compressions at 

 0° and 22°, is evidently going to show much less absolute difference 

 for the two sets of determinations than the compressibilities, suggest- 



TABLE IV. 



Compressibility op H2O at 22°. Comparison of Best Results with 

 Different Piezometers, Weighted Mean, and Final Values. 



ing that the two sets are each consistent with themselves, since they 

 show the same temperature effect. 



Since this paper was written. Parsons and Cook 2 have published 

 data for the compressibility of a few liquids up to 4500 atmos. Their 

 results for water at 4° are shown in Table Ya. compared with the re- 

 sults of this paper. The agreement is closer than 1 per cent at 



2 Parsons and Cook, Proc. Roy. Soc. A, 85, 332-349 (1911). 



