Globe. shown. The impactof the air, at b, produces the force, cg, tt 0 ee while the surplus pressure of the column of air, 7k, over THE “ MODEL” SCROLL SAW. the rarefied conditions under the current, )f, exerts the We illustrate herewith a new scroll saw, excellently pressure, c h. These two forces… … e J ‘ - . ae N . air, between b and f, as well as the deflection of the current, RAW RUBBER. THE VULCANIZING OVEN. can easily be demonstrated by experiment. VARNISHING THE SHOES. whoinhabited those portions of Brazil where the caoutchouc So tree most abounded. Their method of manufacture consis-…
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