A treatise on astronomy |
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Strona 1
... called ASTRONOMY : a science which , from the certainty and evidence of its demonstrations , from the great and manifest advan- tages with which it furnishes us , and from the vast amplitude and sublimity of that universe which it pro ...
... called ASTRONOMY : a science which , from the certainty and evidence of its demonstrations , from the great and manifest advan- tages with which it furnishes us , and from the vast amplitude and sublimity of that universe which it pro ...
Strona 6
... called degrees , and these into minutes and seconds , as explained by the writers on trigonometry , the circumference of the earth , and thence its diameter , may be determined by measuring the length of a degree on the meridian or any ...
... called degrees , and these into minutes and seconds , as explained by the writers on trigonometry , the circumference of the earth , and thence its diameter , may be determined by measuring the length of a degree on the meridian or any ...
Strona 12
... called a great Circle of the sphere ; if the plane do not pass through the centre , the section is called a less circle : hence , a great circle is that which divides the sphere into two equal parts ; and a less circle that which ...
... called a great Circle of the sphere ; if the plane do not pass through the centre , the section is called a less circle : hence , a great circle is that which divides the sphere into two equal parts ; and a less circle that which ...
Strona 13
... called the axis of the heavens ; its extremities are called the poles of the heavens ; and the circumference formed by extending the plane of the equator to the same concave surface is called the equator in the heavens , or the ...
... called the axis of the heavens ; its extremities are called the poles of the heavens ; and the circumference formed by extending the plane of the equator to the same concave surface is called the equator in the heavens , or the ...
Strona 14
... are drawn as secondaries to the rational horizon , are called vertical circles , and serve to measure the altitude or depression of any ce- lestial object . 23. The two points where all the vertical circles which 14 Explanation of Terms .
... are drawn as secondaries to the rational horizon , are called vertical circles , and serve to measure the altitude or depression of any ce- lestial object . 23. The two points where all the vertical circles which 14 Explanation of Terms .
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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.