the recipient, C. If however, the cock, R, is down, then the circuit is automatically closed and the opened, this level rises, and the water reaches the car- steam cut off by the gate-valve. Hence when the gov- bide, causing an evolution of gas. Upon closing the ernor and co-operating parts are… … a number of interesting researches. SOUND WAVE LANTERN SLIDE. moves a transparent belt of celluloid film. Upon
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