Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 239
hold the life-line,one to watch the air-hose, and either two or four— depending upon the deepness of the water inwhich he is working—to man the air-pumps.Again, when searching for something that has 754 NATURE AND SCIENCE FOR YOUNG FOLKS [June, been lost in the water, the diver often has tomake… … DIAGKAM SHOWING THE CONSTRUCTION OF THE SUBMARINE SLED. gen is supplied from a tank which the diver car-ries on his back. This does away with all butone of the attendants, and this one handles thelife-line, which is, also, a telephone connectionbetween himself and the diver. In this way.Dr. Draeger…
Children's literature
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