The Philosophical Transactions and Collections, to the End of the Year 1700: Containing pt. 1, The mathematical papers; pt. 2, The physiological papers; pt. 3, the anatomical papers; pt. 4, The philological and miscellaneous papers, by J. Eames and J. Martyn

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Página 123 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Página 383 - forthwith to apply himself with the most exact care and diligence to the rectifying the tables of the motions of the heavens, and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting the art of navigation.
Página 152 - ... therefore the true or real Place of an Object is perpendicular to the Line in which the Eye is moving, yet the visible Place will not be so, since that...
Página 149 - June, and no less than 39" more northerly than it was in March. From September the star returned towards the south, till it arrived in December to the same situation it was in at that time twelve months, allowing for the difference of declination on account of the precession of the equinox. This was a sufficient proof that...
Página 122 - I make no queftion but that what I call the Purple, is a Mixture of the Purple of each of the upper Series with the Red of the next below it, and the Green a Mixture of the intermediate Colours.
Página 152 - C, could not pass through that axis, unless it is inclined to BD, in the angle CBD. In like manner, if the eye moved the contrary way, from D towards A, with the same velocity; then the tube must be inclined in the angle BDC.
Página 148 - This sensible alteration the more surprised us, in that it was the contrary way from what it would have been had it proceeded from an annual parallax of the star: but being now pretty well satisfied that it could not be entirely owing to the want of exactness in the observations, and having no notion of...
Página 160 - Flatnsteed of the different Distances of the Pole Star from the Pole at different Times of the Year, which were through Mistake looked upon by some as a Proof of the annual Parallax of it, seem to have been made with much greater Care than those of Dr. Hook. For though they do not all exactly correspond with each other, yet from the whole Mr. Flamsteed concluded that the Star was 35...
Página 149 - Draconis, at about the same distance from the north pole of the equator: for though this star seemed to move the same way as a nutation of the earth's axis would have made it, yet, it changing its declination but about half as much as...
Página 152 - I perceived that, if light was propagated in time, the apparent place of a fixed object would not be the same when the eye is at rest, as when it is moving in any other direction than that of the line passing through the eye and object; and that when the eye is moving in different directions, the apparent place of the object would be different.

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