A treatise on astronomy |
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Strona 20
... mean of all the bisecting lines CE be chosen as a meridian , there will be no doubt of its accuracy , particularly ... means of a vernier ; and it is furnished with a telescope ( having cross hairs , & c . ) turning properly upon the ...
... mean of all the bisecting lines CE be chosen as a meridian , there will be no doubt of its accuracy , particularly ... means of a vernier ; and it is furnished with a telescope ( having cross hairs , & c . ) turning properly upon the ...
Strona 31
... mean solar year . 56. To find the length of a sidereal year , M. Cas- sini presents us with this rule : Take the time ( t ) of a fixed star's transit over the meridian by a clock ad- justed to mean solar time ; the year following ...
... mean solar year . 56. To find the length of a sidereal year , M. Cas- sini presents us with this rule : Take the time ( t ) of a fixed star's transit over the meridian by a clock ad- justed to mean solar time ; the year following ...
Strona 60
... mean horizontal parallax of the sun is not more than about 875 , as will be shewn in a subsequent chapter ( Chap . XX . ) ; and of course its parallax at the altitude of 50 ° or 60 ° will be very inconsiderable ; it may be allowed for ...
... mean horizontal parallax of the sun is not more than about 875 , as will be shewn in a subsequent chapter ( Chap . XX . ) ; and of course its parallax at the altitude of 50 ° or 60 ° will be very inconsiderable ; it may be allowed for ...
Strona 67
... mean states of the barometer and ther- mometer . He has also given formulæ , by which the refraction may be found , at any other states of the atmosphere , to as great exactness as need be looked for in such enquiries . 106. The methods ...
... mean states of the barometer and ther- mometer . He has also given formulæ , by which the refraction may be found , at any other states of the atmosphere , to as great exactness as need be looked for in such enquiries . 106. The methods ...
Strona 71
... means of that which is gained from the other . This is best done by tracing out the nature and extent of the ... mean daily motion in either circle . is measured by 59 ′ 8 ′′ nearly . For 365 : 1a :: 360 ° : 59 ′ 8 ′′ .2 . 111 ...
... means of that which is gained from the other . This is best done by tracing out the nature and extent of the ... mean daily motion in either circle . is measured by 59 ′ 8 ′′ nearly . For 365 : 1a :: 360 ° : 59 ′ 8 ′′ .2 . 111 ...
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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
Popularne fragmenty
Strona 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...
Strona 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...
Strona 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.
Strona 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.
Strona 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.
Strona 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.
Strona 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.
Strona 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.
Strona 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.
Strona 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.