232 ME, W. EAIKBAIHN .«D ME. T. TATE ON THE MECHANICAL PEOPEEIIE. 
the glass vessel was atade Enow by a loud vepovt aud by ‘^e — 
observer^. 
During the collapse the globes wove veduced to the 
eases a gteat pari alntost to powde. .lobes had given 
experiments no indication could be louiiu ui 
way, nor of the direction of the primary lines of fracture. collected, and a 
After the globe had as before, by means of 
"tzr — ^hicwss^^ determined has been assumed for 
the thickness of the point of rupture in the calculations. 
. la pressure-gauges of the Schae.hr 
e,vpanamg under pressure. The mdioations are comm . ^ materially di.or 
gauge which moves over a face plate graduated by tnal. In prmcple t „ . 
Irom the aneroid barometer. 
