Aerial NavigationMacmillan and Company, 1877 - 513 pages |
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Page 8
... equal justice , whether the author of it be Briton or foreigner . I shall have to refer to a few actual experiments made on a large scale , to some notions that have been tested with models , but principally to hints or schemes ...
... equal justice , whether the author of it be Briton or foreigner . I shall have to refer to a few actual experiments made on a large scale , to some notions that have been tested with models , but principally to hints or schemes ...
Page 26
... equal rise , which is effected by the leg that is left behind , which pushes his body for- wards and upwards , till the centre of gravity recovers its former beight . The body is thus raised in walking chiefly by the mus- cles of the ...
... equal rise , which is effected by the leg that is left behind , which pushes his body for- wards and upwards , till the centre of gravity recovers its former beight . The body is thus raised in walking chiefly by the mus- cles of the ...
Page 27
... equal to lifting himself and his wings to a height of 30 × 136 · 8 = 4104 yards ( at least 23 miles ) directly upwards . In confirmation of this inference may be taken the fact that the miners in the lowest levels in the mines in ...
... equal to lifting himself and his wings to a height of 30 × 136 · 8 = 4104 yards ( at least 23 miles ) directly upwards . In confirmation of this inference may be taken the fact that the miners in the lowest levels in the mines in ...
Page 28
... equal to the work I am suggesting for him . The enquiry now arises - Can the power thus available be applied to the air without such loss as to make it useless in prac- tice ? This I do not undertake to demonstrate , but shall leave the ...
... equal to the work I am suggesting for him . The enquiry now arises - Can the power thus available be applied to the air without such loss as to make it useless in prac- tice ? This I do not undertake to demonstrate , but shall leave the ...
Page 29
... equal to raising himself 1760 inches in fifteen minutes , i.e. , 117-3 inches in a minute , or 2 inches in a second nearly . We may , without overtaxing the man , suppose him capable of making ten complete beats of the wing in a minute ...
... equal to raising himself 1760 inches in fifteen minutes , i.e. , 117-3 inches in a minute , or 2 inches in a second nearly . We may , without overtaxing the man , suppose him capable of making ten complete beats of the wing in a minute ...
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Common terms and phrases
aerial navigation aeronautics aerostat air-craft amount angles apparatus applied arrangement ascertained attached axis balance ballast balloon boat body bows burden carbonic acid Cayley centre of buoyancy centre of gravity coal gas condensation contrivance cords course craft cubic cylinder Delcourt diameter direction effect endeavour envelope equal equilibrium Études exerted experiments feet figure float flying forces acting former gas-vessel grammes greater ground gutta-percha heat horizontal hydrogen inches latter length lifting power light liquid material means Mech mechanical metal mode Monge motion move necessary obtained oxide plane position pounds pressure propelling force proposed propulsion purpose requisite resistance result rise rowlock semi-minor axis side Sir George Cayley specific gravity speed spheroid steam stiffness sufficient supposed surface suspended tendency texture tion tube upward varnish velocity vertical vessel vulcanised weight whole wind wings zinc
Popular passages
Page v - Make thee an ark of gopher wood; rooms shalt thou make in the ark, and shalt pitch it within and without with pitch. 15 And this is the fashion which thou shalt make it of: The length of the ark shall be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.
Page vii - For I dipt into the future, far as human eye could see, Saw the vision of the world, and all the wonder that would be; Saw the heavens fill with commerce, argosies of magic sails, Pilots of the purple twilight, dropping down with costly bales; Heard the heavens f1ll with shouting, and there rained a ghastly dew From the nations...
Page 95 - Then I looked on all the works that my hands had wrought, and on the labour that I had laboured to do : and behold, all was vanity and vexation of spirit, and there was no profit under the sun.
Page 286 - And God said, Let the waters under the heaven be gathered together into one place, and let the dry land appear: and it was so.
Page vii - In the Parliament of man, the Federation of the world. There the common sense of most shall hold a fretful realm in awe, And the kindly earth shall slumber, lapt in universal law.
Page v - A window shalt thou make to the ark, and in a cubit shalt thou finish it above ; and the door of the ark shalt thou set in the side thereof; with lower, second, and third stories shalt thou make it.
Page 286 - And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind : and God saw that it was good.
Page vi - Men, my brothers, men the workers, ever reaping something new : That which they have done but earnest of the things that * they shall do : *.n )• "jf.
Page 191 - There are four several ways whereby this flying in the air hath been, or may be attempted. Two of them by the strength of other things, and two of them by our own strength. 1 . By spirits, or angels.
Page 192 - ... spring might perhaps be serviceable for the motion of this engine, yet it were better to have it assisted by the labour of some intelligent mover, as the heavenly orbs are supposed to be turned. And therefore if it were made big enough to carry sundry persons together, then each of them in their...