form of vacuum brake now extemsively in use; the in these columns. The apparatus required for the vac- weight representing the brake. uurn experiments cost lessthan the pump. It consists The disruptive power of atmospheric¢ pressure is ile of a fish globe 6 in. in diameter, a disk of thick, soft… … exhaustion proceeds, the pressure becomes painful and the pump, the cover will be retained on the globe by~ atmospheric pressure, and will need no further holding. - difficuit to endure. BALL PARADOX. by the hand. ; : res It is easy under such circumstances to realize that The expansibility of air…
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