Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLVII. No. 11. — December, 1911. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL 

 LABORATORY, HARVARD UNIVERSITY. 



THE MEASUREMENT OF HYDROSTATIC PRESSURES 



UP TO 20,000 KILOGRAMS PER 



SQUARE CENTIMETER. 



By p. W. Bridgman. 



