Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 446
y stops the bubbles from descend-ing, and no more air can get into the chamberuntil the head is again lowered into the water.When the quantity of air is lessened in the cham-ber (E), the bell drops and bubbles once morego down. A further safeguard or blow-off (J)is provided which is some inches… … A SECTION OF THE MINE. A Canal containing water. B Intake head. C House over intake head. D Shaft leading to air-chamber. E Air-chamber.F Water outlet. G Air-pipe leading to bell. H Bell to raise intake out of water. cut out of the solid stone three hundred and fiftyfeet below the surface of the…
Children's literature
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