Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 314
aper over B. The smoke descends this chimney, and passes throughthe vessel and out at A. This illustrates the method often adopted toproduce a ventilating draft through mines. Let the interior of the tinvessel represent a mine deep in the earth, and the chimneys two shaftssunk to opposite…
Physics
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