 | Engineering - 1926 - 378 pages
...will be in the raising of it from the ground ; neer (sic) unto which, the earth's attractive vigor, is of greatest efficacy. But for the better effecting...strength of winds, and by taking its first rise from some mounain or other high place. When once it is aloft in the air, the motion of it will be easie, as it... | |
 | Edward Aloysius Pace, Thomas Edward Shields - Catholic schools - 1918 - 428 pages
...Fable for its further Confirmation. of it from the Ground; near unto which, the Earths attractive Vigor is of greatest Efficacy. But for the better effecting...once it is aloft in the Air, the Motion of it will be easie, as it is in the Flight of all kinds of Birds, which being at any great Distance from the Earth,... | |
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Wilkins writes that the main difficulty and labour of it will be in the raising of it from the ground; near unto which, the earths attractive vigor is of greatest efficacy. But for the better effecting of this, it may be helped by the strength of winds,... 