BREDGMAN. 



WATER UNDER PRESSURE. 



461 



zero pressure is arbitrary in these tables. The data of these tables, to- 

 gether with the quantities of steel, water, and gasolene, are sufficient to 

 enable anyone to check up the computations. The weight of the steel 

 cylinder filling the lower cylinder was 286.345 gm. The weight of the 

 steel shell containing the water was 51.818gm. Theweightof the water 



TABLE VII. 



Dilatation of Water below 0° at Various Pressures. 



was 26.775 gm. The density of steel was 7.840 at 17°, and it was 

 assumed that the cubical dilatation of steel was 0.00036 and the cubi- 

 cal compressibility 0.056 in kgm./cm.^ The volume in cm.' of the bore 

 of the upper cylinder, 1 inch long, was 4.117 cm.^ With increasing 

 pressure this increases 1.35 per cent for 10,000 kgm. 



The results of the computations firom the data of these tables are 

 given in Table VII. and Figure 4, showing the proportional change of 

 the original volume at 0° and atmospheric pressure by which the water 

 shrinks at various pressures on passing from 0° to the temperature 

 listed. 



From these results, both above and below 0°, the actual volume of the 

 water for regular pressure and temperature intervals has been found 

 and is given in Table XXXI. on page 539. 



