Popular Lectures on Science and Art: Delivered in the Principal Cities and Towns of the United States, Volume 1Greeley & McElrath, 1850 - Astronomy |
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Page 55
... fact , one would be only half as bright as the other . What , then , shall we say of the planets ? Grant that the pupils of the eyes of all creatures endowed with vision upon them are enlarged in their opening according as the planets ...
... fact , one would be only half as bright as the other . What , then , shall we say of the planets ? Grant that the pupils of the eyes of all creatures endowed with vision upon them are enlarged in their opening according as the planets ...
Page 56
... fact , they , like the earth , have days and nights . But are those days and nights regulated by the same intervals as ours ? for that is an important question ; such intervals being , as we have shown , a key to the organizations and ...
... fact , they , like the earth , have days and nights . But are those days and nights regulated by the same intervals as ours ? for that is an important question ; such intervals being , as we have shown , a key to the organizations and ...
Page 57
... fact we should have had changes of light and darkness utterly unfit for our wants . In the first case we should have been deprived of seasons and of the means of main- taining any convenient chronology . Thus , in either case , we ...
... fact we should have had changes of light and darkness utterly unfit for our wants . In the first case we should have been deprived of seasons and of the means of main- taining any convenient chronology . Thus , in either case , we ...
Page 61
... fact , the dwellings of beings in all respects , even from their lowest physical wants to their highest social advantages , like ourselves , crowd upon the mind so thickly that we can scarcely give them expression in a clear and ...
... fact , the dwellings of beings in all respects , even from their lowest physical wants to their highest social advantages , like ourselves , crowd upon the mind so thickly that we can scarcely give them expression in a clear and ...
Page 68
... fact , identical ; they differ in nothing except the accidental and unimportant circumstance of the magnitudes of the lines and angles that enter the question . In short , the measurement of distances of objects in the heavens is ...
... fact , identical ; they differ in nothing except the accidental and unimportant circumstance of the magnitudes of the lines and angles that enter the question . In short , the measurement of distances of objects in the heavens is ...
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POPULAR LECTURES ON SCIENCE &, Volume 2 Dionysius 1793-1859 Lardner,Redfield &. Savage (1846) Bkp Cu-Banc No preview available - 2016 |
Common terms and phrases
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 firmament 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 negative object observed orbit pass phenomena physical pile planet pole position present pressure principle produced proportion quantity radiation rays reflected rendered 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
Popular passages
Page 429 - 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.
Page 121 - 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.
Page 121 - 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.
Page 25 - The square of the hypotenuse of a right-angled triangle is equal to the sum of the squares of the other two sides.
Page 122 - 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.
Page 121 - ... rods a wire down the outside of the building into the ground; or down round one of the shrouds of a ship and down her side till it reaches the water?
Page 248 - 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.
Page 114 - Electricity, which was more generally read and admired in all parts of Europe than these letters. There is hardly any European language into which they have not been translated...
Page 121 - ... 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.
Page 171 - ... 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...