Popular Lectures on Science and Art, Tom 2Blakeman and Mason, 1846 |
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Popular Lectures on Science and Art: Delivered in the Principal Cities and ... Dionysius Lardner Podgląd niedostępny - 2015 |
Popular Lectures on Science and Art: Delivered in the Principal Cities and ... Dionysius Lardner Podgląd niedostępny - 2015 |
Kluczowe wyrazy i wyrażenia
air-pump angle apparent magnitude appear applied astronomical atmospheric air atmospheric pressure axis axle body boiler bottom called cause celestial equator centre of gravity cock combustion communication condensation constellation continued cylinder degree diameter diminished direction distance diurnal motion double star effect electricity engine equal explained feet firmament fluid fulgurites greater heavens Herschel inclined plane increased instrument latent heat length lever light liquid machine magnet magnitude manner mass mechanical mercury meridian metal motion moving nebulous necessary object observed opened ounces oxygen particles pass phenomena pinion piston placed position pounds principle produced proportion pulley quantity of heat raised received rendered represented in fig resistance revolution revolve rope round screw sensible heat Sir William Herschel solid space square inch steam steam-engine stroke substances sufficient suppose surface telescope temperature thermometer thread tion tube vacuum valve vapor velocity vessel weight wheel wire
Popularne fragmenty
Strona 51 - In the six hundredth year of Noah's life, in the second month, on the seventeenth day of the month...
Strona 51 - And God remembered Noah, and every living thing, and all the cattle that was with him in the ark: and God made a wind to pass over the earth, and the waters assuaged...
Strona 346 - This earth ? reciprocal, if land be there, Fields and inhabitants. Her spots thou seest As clouds, and clouds may rain, and rain produce Fruits in her soften'd soil, for some to eat Allotted there ; and other suns, perhaps, With their attendant moons, thou wilt descry, Communicating male and female light, Which two great sexes animate the world, Stored in each orb, perhaps, with some that live...
Strona 356 - Centauri and the Cross ; while to the north it fades away pale and dim, and is in comparison hardly traceable.
Strona 264 - ... friction, they would recoil from their places, and fail to produce the desired effect. Even when the wedge is used as a mechanical engine, the presence of friction is absolutely indispensable to its practical utility. The power...
Strona 355 - Herschel, whose powerful telescopes have effected a complete analysis of this wonderful zone, and demonstrated the fact of its entirely consisting of stars. So crowded are they in some parts of it, that by counting the stars in a single field of his telescope, he was led to conclude that 50000 had passed under his review in a zone two degrees in breadth, during a single hour's observation.
Strona 368 - I have seen double and treble nebulae variously arranged ; large ones with small, seeming attendants ; narrow but much extended lucid nebulae or bright dashes ; some of the shape of a fan, resembling an electric brush issuing from a lucid point...
Strona 370 - ... figure. Several astronomers, on comparing this nebula with the figures of it handed down to us by its discoverer, Huygens, have concluded that its form has undergone a perceptible change. But when it is considered how difficult it is to represent such an object duly, and how entirely its appearance will differ, even in the same telescope, according to the clearness of the air, or other temporary causes, we shall readily admit that we have no evidence of change that can be relied on.
Strona 412 - I mentioned to you a method of still doubling the effect of the steam, and that tolerably easy, by using the power of steam rushing into a vacuum, at present lost.
Strona 354 - To GOD'S eternal house direct the way, A broad and ample road, whose dust is gold And pavement stars, as stars to thee appear, Seen in the galaxy, that milky way, Which nightly as a circling zone thou seest Powder'd with stars.