A treatise on astronomy |
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Página 10
... given in species ; and the ratio of VC2 - ZC2 ( = QXXXW ) to RZ - QV ( = RXXXS ) is given , which is the ratio of VC to CP2 : consequent ly the ratio of CA to CP is given . Hence , if the sine and co - sine of the greater latitude be ...
... given in species ; and the ratio of VC2 - ZC2 ( = QXXXW ) to RZ - QV ( = RXXXS ) is given , which is the ratio of VC to CP2 : consequent ly the ratio of CA to CP is given . Hence , if the sine and co - sine of the greater latitude be ...
Página 30
... given the following method of finding the length of the tropical year : Observe the meridian altitude ( a ) of the sun on the day nearest to an equinox : then the next year take its meridian altitude on two succeeding days , one when ...
... given the following method of finding the length of the tropical year : Observe the meridian altitude ( a ) of the sun on the day nearest to an equinox : then the next year take its meridian altitude on two succeeding days , one when ...
Página 38
... given . One of the best methods of performing this problem has been thus investigated : Let S be the place of the body ( fig . 11 , Pl . I. ) , EC the ecliptic , EQ the equator ; and SL and SR being respectively perpendicular to EC and ...
... given . One of the best methods of performing this problem has been thus investigated : Let S be the place of the body ( fig . 11 , Pl . I. ) , EC the ecliptic , EQ the equator ; and SL and SR being respectively perpendicular to EC and ...
Página 40
... given longitudes . In the triangle AP B , the sides AP , BP , the co - latitudes , being given , and the included angle P , we thence find A B , and the angle ABP . Then , in the triangle A S B are given all the sides ( viz . AS and SB ...
... given longitudes . In the triangle AP B , the sides AP , BP , the co - latitudes , being given , and the included angle P , we thence find A B , and the angle ABP . Then , in the triangle A S B are given all the sides ( viz . AS and SB ...
Página 54
... given , the sine of the pa- rallax is as the sine of the apparent zenith distance ( Art . 83. ) ; consequently , when neither is given , the sine of the parallax is conjunctly , as the distance from the earth's centre reciprocally , and ...
... given , the sine of the pa- rallax is as the sine of the apparent zenith distance ( Art . 83. ) ; consequently , when neither is given , the sine of the parallax is conjunctly , as the distance from the earth's centre reciprocally , and ...
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Términos y frases comunes
aberration altitude aphelion apparent motion apparent semidiameter appear ascertained astronomers axis azimuth calculation centre circle co-sine co-tang comet conjunction consequently deduced degree described determined diameter difference disc diurnal motion earth ecliptic ellipsis epicycloid equal errour excentricity eye's fixed stars given greater greatest equation Greenwich heavenly bodies heavens heliocentric hence horary motion horizon horizontal parallax hour angle inclination inferiour interval jupiter known latitude longitude lunar eclipses magnitude mean anomaly mean distance mean motion mercury meridian method moon moon's nearly node noon obliquity observations opposition orbit parallax parallel passing perihelion perpendicular planet pole PROB proportion radius ratio refraction respect revolution right ascension right-angled satellites saturn shadow shew shewn sine solar star's subtracted sun's declination superiour supposed tang tangent telescope tion triangle true anomaly true place tude velocity venus vertical whence zenith distance
Pasajes populares
Página 484 - Shot through vast masses of enormous weight ? Who bid brute matter's restive lump assume Such various forms, and gave it wings to fly ? Has matter innate motion ? then each atom, Asserting its indisputable right To dance, would form an universe of dust...
Página 487 - This Being governs all things, not as the soul of the world, but as Lord over all; and on account of his dominion he is wont to be called Lord God...
Página 140 - The qualities of bodies, which admit neither intensification nor remission of degrees and which are found to belong to all bodies within the reach of our experiments, are to be esteemed the universal qualities of all bodies whatsoever.
Página 489 - As a blind man has no idea of colors, so have we no idea of the manner by which the all-wise God perceives and understands all things. He is utterly void of all body and bodily figure, and can therefore neither be seen, nor heard, nor touched ; nor ought he to be worshipped under the representation of any corporeal thing. We have ideas of his attributes, but what the real substance of anything is, we know not.
Página 489 - Whence also He is all similar, all eye, all ear, all brain, all arm, all power to perceive, to understand, and to act ; but in a manner not at all human, in a manner not at all corporeal, in a manner utterly unknown to us.
Página 488 - He is eternal and infinite, omnipotent and omniscient; that is, his duration reaches from eternity to eternity; his presence from infinity to infinity; he governs all things, and knows all things that are or can be done.
Página 36 - Seek him that maketh the seven stars and Orion, And turneth the shadow of death into the morning, And maketh the day dark with night: That calleth for the waters of the sea, And poureth them out upon the face of the earth : The Lord is his name: That strengtheneth the spoiled against the strong, So that the spoiled shall come against the fortress.
Página 36 - Ye who turn judgment to wormwood, and leave off righteousness in the earth, seek him that maketh the seven stars and Orion, and turneth the shadow of death into the morning, and maketh the day dark with night; that calleth for the waters of the sea, and poureth them out upon the face of the earth; the Lord is his name; that strengtheneth the spoiled against the strong, so that the spoiled shall come against the fortress.
Página 126 - Systems in many respects resemble machines. A machine is a little system, created to perform, as well as to connect together, in reality, those different movements and effects which the artist has occasion for. A system is an imaginary machine invented to connect together in the fancy those different movements and effects which are already in reality performed.
Página 127 - The machines that are first invented to perform any particular movement are always the most complex, and succeeding artists generally discover that, with fewer wheels, with fewer principles of motion, than had originally been employed, the same effects may be more easily produced.