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Page 88
At the base end there could also be laid down a platform on each side of the tracks , seven feet in width . The bricks used in this chimney would make a six - foot sidewalk , over two and a half miles in length .
At the base end there could also be laid down a platform on each side of the tracks , seven feet in width . The bricks used in this chimney would make a six - foot sidewalk , over two and a half miles in length .
Page 173
Still another maintains that what you really need when you get 30,000 feet or so above the earth is a supply of pure oxygen . The oxygen scheme has been tried by several men who gave up their lives as evidence that it was insufficient ...
Still another maintains that what you really need when you get 30,000 feet or so above the earth is a supply of pure oxygen . The oxygen scheme has been tried by several men who gave up their lives as evidence that it was insufficient ...
Page 288
meant death in the bottom of the canyon hundreds of feet below . The first step in the actual work of construction was to obtain a dry river bed in which to place the foundation of concrete . For this purpose a tunnel of sufficient size ...
meant death in the bottom of the canyon hundreds of feet below . The first step in the actual work of construction was to obtain a dry river bed in which to place the foundation of concrete . For this purpose a tunnel of sufficient size ...
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Contents
MAGAZINE | 586 |
Cover Design LEJAREN HILLER | 591 |
Men of SciencePORTRAITS | 605 |
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