BRIDGMAN. — WATER UNDER PRESSURE. 



453 



be found at every pressure by combining with the change of volume 

 calculated by the formula 



Av = op + hp^, 



where log a = 5.5942 — 10, 



and log (- h) = 1.3512 - 10, 



the small correction term given by the deviation curve of Figure 2. 



PRESSURE, KGM/CM^XIO^ 



FiouRE 1. The change of volume of water at 0° C. as obtained with pie- 

 zometer No. 6. 



The data for 22° were obtained in exactly the same way. Only 

 three piezometers were used here instead of five as at 0°. The results 

 are slightly less irregular, owing to greater familiarity with the method 



