...the production of the precession, of the equinoxes. ' At the vernal equinox, for instance, a straight line drawn from the centre of the sun to that of the earth is in the plane of the equator, and therefore, as equal portions of the protuberant matter of the earth...

...of its motion round the Sun. To follow more particularly these appearances, let us imagine a radius drawn from the centre of the Sun to that of the Earth : this radius will be perpendicular to the plane which separates the hemisphere which is enlightened...

...than the earth, and some millions of miles distant from it, to justify the strict sense of the words, a line drawn from the centre of the sun to that of the earth must exactly pass by Gibeon, which we know it cannot do, because no part of the holy land lies within...

...earth's equator, is not always directed towards the centre of the sun, during her annual revolution ; but twice only in the year a line drawn from the centre of the sun to that of our globe passes through the points where the equator and the ecliptic cross each other; for at all...

...these two parts is determined by the great circle IL Jc, whose plane is perpendicular to the line SO drawn from the centre of the sun to that of the earth. To this line we suppose the sun's rays to be parallel ; seeing that from the great distance of the...

...these two parts is determined by the great circle IL k, whose plane is perpendicular to the line SO drawn from the centre of the sun to that of the earth. To this line we suppose the sun's rays to be parallel ; seeing that from the great distance of the...

...equable, yet we measure the length of the natural day by means of the sun, whose apparent annual motion js not in the equator, or any of its parallels, but in...it passes through the equator or the tropics, which are circles parallel to the equator, the sun and the clocks go together as far as regards this cause,...

...equator of the earth, in its annual journey, is not always directed towards the centre of the sun? T. I do ; twice only in the year, a line drawn from the...other times, it passes through some other part of that ohlique circle which is represented on the glohe hy the ecliptic line. Now when it passes through the...

...equator of the earth, in its annual journey, is not always directed towards the centre of the sun ? T. I do ; twice only in the year, a line drawn from the centre of the sun lo that of the earth passes through those points where the equator and ecliptic cross one another ;...

...boundary of these two parts is determined by a great circle, the plane of which is perpendicular to the line drawn from the centre of the sun to that of the earth. To this line we suppose the sun's rays to be parallel; seeing that by reason of the great distance...