Lessons on the globes1842 |
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Side 5
... telescopes , has revealed new wonders in the infinity around us . Can the pupil's imagination furnish us with a room , the walls and ceiling of which shall be 35,000 times as distant as those of the present room are ? Herschel has ...
... telescopes , has revealed new wonders in the infinity around us . Can the pupil's imagination furnish us with a room , the walls and ceiling of which shall be 35,000 times as distant as those of the present room are ? Herschel has ...
Side 6
... telescope un- veils to us . * The number of stars which crowd some parts of the heavens , is truly marvellous ; Dr. Herschel calculated that a portion of the milky way , about ten degrees long and two and a half broad , contained ...
... telescope un- veils to us . * The number of stars which crowd some parts of the heavens , is truly marvellous ; Dr. Herschel calculated that a portion of the milky way , about ten degrees long and two and a half broad , contained ...
Side 7
... Telescope indicates the insignifi- * The application of the achromatic correction to the Microscope has admitted a ninefold quantity of light , and great distinctness . ( See " Microsc . Cab . , " by Mr. A. Pritchard , of Fleet Street ...
... Telescope indicates the insignifi- * The application of the achromatic correction to the Microscope has admitted a ninefold quantity of light , and great distinctness . ( See " Microsc . Cab . , " by Mr. A. Pritchard , of Fleet Street ...
Side 10
... telescopes are often delighted with the beauty of this phenomenon , along the con- stantly varying boundary of light on the surface of our mountainous satellite . Even an inferior telescope , if on a stand , affords a very in- teresting ...
... telescopes are often delighted with the beauty of this phenomenon , along the con- stantly varying boundary of light on the surface of our mountainous satellite . Even an inferior telescope , if on a stand , affords a very in- teresting ...
Side 15
... telescopes , will , therefore , be in the ratio of the squares of the diameters of the tubes , or of the glasses called the " object - glasses " at their ends ; or , if the telescopes be of the reflecting construction , in the ratio of ...
... telescopes , will , therefore , be in the ratio of the squares of the diameters of the tubes , or of the glasses called the " object - glasses " at their ends ; or , if the telescopes be of the reflecting construction , in the ratio of ...
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Vanlige uttrykk og setninger
altitude appear Arcturus astronomers atmosphere attraction axis azimuth beams Boötes brass meridian brazen meridian Bridgewater Treatise bring the given Canis Major Cape CELESTIAL GLOBE centre centrifugal force circle coincide consequently constellations corresponding culminating declination diameter difference direction disk distance diurnal diurnal arc earth earth's surface east eastward ecliptic electricity elevated equal equator equinoctial exactly feet fluid Fomalhaut force Frigid Zone given place heat heavenly body hemisphere Hence Herschel horizon inclined inhabitants instant John Herschel Jupiter Jupiter's latitude length light London longitude magnet mass midnight miles minutes moon moon's motion nearly node noon north pole oblique observations orbit parallax particles pass period plane portion position PROBLEM pupil quadrant rays right ascension rising rotation satellites Saturn seen shadow sidereal day solar south pole sphere star sun's place supposed telescope TERRESTRIAL GLOBE tion twilight Uranus vapour velocity Venus vertical whilst zenith
Populære avsnitt
Side 244 - For thus saith the Lord that created the heavens; God himself that formed the earth and made it; he hath established it, he created it not in vain, he formed it to be inhabited: I am the Lord; and there is none else.
Side 6 - The one has suggested to me that, beyond and above all that is visible to man, there may lie fields of creation which sweep immeasurably along, and carry the impress of the Almighty's hand to the remotest scenes of the universe : the other suggests to me...
Side xi - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Side 403 - This disregard is neither supercilious nor causeless. The constellations seem to have been almost purposely named and delineated to cause as much confusion and inconvenience as possible. Innumerable snakes twine through long and contorted areas of the heavens, where no memory call follow them ; bears, lions, and fishes, large and small, northern and southern, confuse all nomenclature, &c.
Side 397 - Venus a pea, on a circle of 284 feet in diameter ; the Earth also a pea, on a circle of 430 feet ; Mars a rather large pin's head, on a circle of 654 feet ; the Asteroids, grains of sand, in orbits of from 1000 to 1200 feet; Jupiter a moderate-sized orange, in a circle nearly half a mile across...
Side 227 - As he sat alone in a garden, he fell into a speculation on the power of gravity ; that as this power is not found sensibly diminished at the remotest distance from the centre of the earth, to which we can rise, neither at the tops of the loftiest buildings, nor even on the summits of the highest mountains ; it appeared to him reasonable to conclude, that this power must extend much...
Side 161 - God," as was said by the ancients, "works by geometry:" the legislation of the material universe is necessarily delivered in the language of mathematics ; the stars in their courses are regulated by the properties of conic sections, and the winds depend on arithmetical and geometrical progressions of elasticity and pressure.
Side 284 - ... the earth. The fall of meteoric stones is much more frequent than is generally believed. Hardly a year passes without some instances occurring ; and if it be considered that only a small part of the earth is inhabited, it may be presumed that numbers fall...
Side 6 - I tread upon, the other redeems it from all its insignificance, for it tells me that in the leaves of every forest, and in the flowers of every garden, and in the waters of every rivulet, there are worlds teeming with life, and numberless as the glories of the firmament.
Side 214 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.