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 63
... apparent magnitude of the sun to these planets will be in the same proportion . To Jupiter it will have an apparent diameter five times less than to the earth . To Saturn the diameter will be ten times less , and to the planet Herschel ...
... apparent magnitude of the sun to these planets will be in the same proportion . To Jupiter it will have an apparent diameter five times less than to the earth . To Saturn the diameter will be ten times less , and to the planet Herschel ...
Page 68
... magnitude and which at any known distance will have the same apparent size . As this is important , considered as a general principle applied to all objects in the heavens , it may not be uninteresting to develop it some- what fully in ...
... magnitude and which at any known distance will have the same apparent size . As this is important , considered as a general principle applied to all objects in the heavens , it may not be uninteresting to develop it some- what fully in ...
Page 69
... apparent size of these bodies , from a cause that we shall explain on another occasion , the moon at one time a little more than covers the sun and at another time a little less . In short , the average apparent magnitude of these ...
... apparent size of these bodies , from a cause that we shall explain on another occasion , the moon at one time a little more than covers the sun and at another time a little less . In short , the average apparent magnitude of these ...
Page 74
... apparent breadth , so that when the spot approaches the edge of the sun , the only part that is visible is the ... magnitude of the spots , and the rate at which they increase and diminish , the velocity of their edges has been ...
... apparent breadth , so that when the spot approaches the edge of the sun , the only part that is visible is the ... magnitude of the spots , and the rate at which they increase and diminish , the velocity of their edges has been ...
Page 75
... apparent magnitude of the sun to the whole extent of the firmament , that is , in the pro- portion of about one to three hundred thousand . A far less intensity of solar radiation collected in the focus of a burning - glass , is ...
... apparent magnitude of the sun to the whole extent of the firmament , that is , in the pro- portion of about one to three hundred thousand . A far less intensity of solar radiation collected in the focus of a burning - glass , 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...