em of com- tached to the end of a silk thread 100 meters in municating vessels, the smoke is sucked through length, and wound on areel. To measure the speed, the cigar holder tube, A; and, when it rises, one end of the thread is wound round the finger, the the smoke is expelled through the tubes,… … THE APPARATUS. D,, are full of water, as is also the connecting siphon, Si. into compartment, D,, and then runs through of the thread from the reel. When the distance of the siphon, 8, into the collector, C, where the 100 meters is traversed, a slight shock is felt on the liquid reaches the…
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