A History of Science, Volume 7 |
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A History of Science; Volume 4, Volume 4 Henry Smith Williams,Edward Huntington Williams No preview available - 2017 |
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aeroplane air brake American apparatus astronomical attempts automobile axis battery bicycle bird boiler built cable carried century Charlotte Dundas chronometer compass compound locomotives construction course crew cylinders degree device direction distance diving boats electric engine experiments fact feet fifty flight flying flying-machine Fulton George Stephenson gyrocar gyroscope horizontal hundred invention inventor iron knots later latitude length locomotive longitude machine magnetic marine mechanism ment meridian method miles an hour minutes modern motor nautical Nautical Almanac nautical miles navigation observation ocean operation ordinary paddle-wheel passengers patents pole position possible pounds practical principle propelled rail railway record Richard Trevithick road Rocket rudder running sailing Sans-pareil screw sextant ship ship's speed steam steam locomotive steamboat steamer submarine submarine boat submerged success surface tion tons torpedo track train pipe vehicle vessel voyage weight wheels Wilbur Wright Wright brothers
Popular passages
Page 98 - He went under the ship and attempted to fix the wooden screw into her bottom, but struck, as he supposes, a bar of iron which passes from the rudder hinge, and is spiked under the ship's quarter. Had he moved a few inches, which he might have done without rowing, I have no doubt but he would have found wood where he might have fixed the screw...
Page 71 - It was in the early autumn of the year 1807 that a knot of villagers was gathered on a high bluff just opposite Poughkeepsie, on the west bank of the Hudson, attracted by the appearance of a strange, dark-looking craft, which was slowly making its way up the river.
Page 96 - When the skilful operator had obtained an equilibrium, he could row upward, or downward, or continue at any particular depth, with an oar, placed near the top of the vessel, formed upon the principle of the screw, the axis of the oar entering the vessel; by turning the oar one way he raised the vessel, by turning it the other way he depressed it.
Page 30 - Christendom,' as partaking as much of a literary as of a professional character, it cannot be said that the Doctor was perfectly correct ; though...
Page 232 - Any one who shall see in the sky such a globe (which resembles the darkened moon during an eclipse) , should be aware that, far from being an alarming phenomenon, it is only a machine, made of taffetas, or light canvas covered with paper, that cannot possibly cause any harm, and which will some day prove serviceable to the wants of society.
Page 97 - The skilful operator could swim so low on the surface of the water as to approach very near a ship in the night without fear of being discovered, and might, if he chose, approach the stem or stern above water with very little danger.
Page 138 - ... slower rate of combustion combined with a mild exhaust produces a higher efficiency from the coal burned. In a stationary engine, which does not produce its own steam supply, it is of course proper to measure its efficiency solely by its economical consumption of steam. In an engine of this description the boilers are fired independently, and the draft is formed from causes entirely separate and beyond the control of the escape of steam from the cylinders ; hence, any economy shown by the boilers...
Page 130 - ... 4. The engine and boiler must be supported on springs, and rest on six wheels, the height of the whole not exceeding fifteen feet to the top of the chimney. 5. The engine with water must not weigh more than six tons; but an engine of less weight would be preferred on its drawing a proportionate load behind it ; if of only four and a half tons, then it might be put on only four wheels.
Page 96 - An oar, formed upon the principle of the screw, was fixed in the fore part of the vessel ; its axis entered the vessel, and being turned one way, rowed the vessel forward, but being turned the other way rowed it backward ; it was made to be turned by the hand or foot.
Page 288 - ... we saw that the calculations upon which all flying machines had been based were unreliable, and that all were simply groping in the dark. Having set out with absolute faith in the existing scientific data, we were driven to doubt one time after another, till finally, after two years of experiment, we cast it all aside, and decided to rely entirely upon our own investigations.