Popular Lectures on Science and Art, 1. kötetBlakeman and Mason, 1846 |
Más kiadások - Összes megtekintése
Popular Lectures on Science and Art: Delivered in the Principal ..., 2. kötet Dionysius Lardner Nincs elérhető előnézet - 2015 |
Gyakori szavak és kifejezések
acid alkali apparent magnitude appear Arago ascertained astronomical atmosphere attraction barometer body cause centre circumstances clouds color comet conductor consequently degree diameter direction discovery disk distance diurnal motion earth eclipse effect electricity electrified equal experiments fact fluid force glass globe greater Halley's comet heat height hemisphere Herschel hundred inch increased interval John Herschel Jupiter less Leyden jar light liquid luminous lunar lunar phases magnitude mercury metallic meteors millions of miles motion move nature nearly negative object observed orbit pass phenomena physical pile planet pole position present principle produced proportion quantity radiation rays reflected rendered revolves round the sun Saturn seen Sir William Herschel solar solar eclipse solar system space stars substances sun's supposed surface telescope temperature theory thermometer thunder tides tion tricity tube vapor velocity vessel visible Voltaic Voltaic pile weather wire zenith zinc
Népszerű szakaszok
429. oldal - In the six hundredth year of Noah's life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great ° deep broken up, and the J windows of heaven were opened.
121. oldal - If any danger to the man should be apprehended (though I think there would be none), let him stand on the floor of his box, and now and then bring near to the rod the loop of a wire that has one end fastened to the leads, he holding it by a wax handle ; so the sparks, if the rod is electrified, will strike from the rod to the wire, and not affect him.
121. oldal - To determine the question, whether the clouds that contain lightning are electrified or not, I would propose an experiment to be tried where it may be done conveniently.
25. oldal - The square of the hypotenuse of a right-angled triangle is equal to the sum of the squares of the other two sides.
121. oldal - ... represent the motion of the clouds over the earth ; and the erect iron punch, a hill or high building ; and then we see how electrified clouds passing over hills or high buildings at too great a height to strike, may be attracted lower till within their striking distance. And, lastly, if a needle fixed on the punch with its point upright, or even on the floor below the punch, will draw the fire from the scale silently at a much greater than the striking distance, and so prevent its descending...
446. oldal - Newton's law of cooling" which states that the rate of decrease of the temperature of a body is proportional to the difference between the temperature of the body and that of the medium; where Г is the temperature of the body at time t and GO the constant temperature of the medium.
122. oldal - With this apparatus, on the appearance of a thunder-gust approaching, he went out into the commons, accompanied by his son," to whom alone he communicated his intentions, well knowing the ridicule which, too generally for the interest of science, awaits unsuccessful experiments in philosophy.
248. oldal - Saturn, yet micrometrical measurements of extreme delicacy" have demonstrated that the coincidence is not mathematically exact, but that the centre of gravity of the rings oscillates round that of the body, describing a very minute orbit, probably under laws of much complexity.
121. oldal - ... feet, pointed very sharp at the end. If the electrical stand be kept clean and dry, a man standing on it, when such clouds are passing low, might be electrified and afford sparks, the rod drawing fire to him from a cloud.
171. oldal - ... domain of physical science, and clothes the natural philosopher with powers denied to the political and moral inquirer, yet foreknowledge is eminently the privilege of the astronomer. Nature has raised the curtain of futurity, and displayed before him the succession of her decrees, so far as they...