Matho: Or, the Cosmotheoria Puerilis, a Dialogue. In which the First Principles of Philosophy and Astronomy are Accommodated to the Capacity of Young Persons, ... Translated, and Enlarged by the Author. In Two Volumes. To which is Added, a Complete Index

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A. Millar, 1745 - Astronomy

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Page 123 - ... no day or night for many turnings of the earth, within the polar circles ; why there is but one day and one night in the whole year at the poles ; and why the days and nights are equally long all the year round at the equator, which is always equally cut by the circle bounding light and darkness.
Page 103 - P, be ten ounces, nearly equal to the square of 3£, the distance of U from w; it will be found, upon turning the machine by the winch, that the balls, U and V, will raise their respective weights at the same instant of time. Which confirms that famous proposition of Kepler, viz. That the squares of the periodical times of the planets round the sun, are in proportion to the cubes of their distances from him; and that the sun's attraction is inversely as the square of the distance from his centre...
Page 200 - ... the particles of light are passing from the satellite to the earth (the planet being, when in opposition, nearer to the earth than when in conjunction, by the whole diameter of the earth's orbit), and in which it is inferred that the velocity of light must consequently be such as to allow it to pass from the sun to the earth in about eight or ten minutes. On the other hand, it is well known that Cassini at first objected to the transmission of light through a part of space in a certain time as...
Page 106 - These stars are observable at night, because they are not intercepted from our sight by the sun's rays ; and in this manner they appear during the whole winter, only they seem to get more westerly every night, as the earth moves gradually by them to the east. To make this still more clear, place the earth in the planetarium between the sun and any of the signs, that side towards the sun will be day, and that towards the sign night : it follows, that at night we are...
Page 260 - ... Lipsius sagt: alii habent famam alii merentur. [29] Herr Bianconi sagt in seinen Briefen an den Marchese Hercolani 2— Brief Malereien und Bildsäulen zusammen gestellt machen einen optischen Übelklang. [30] Aus der Cosmotheoria puerilis TI Conference V. p. [276] sollte man aus folgender Stelle : The stork and the crane have been memorable in all ages for their annual peregrinations, tho' they do not visit us, [schließen,] daß diese Tiere nicht in Engelland wären.
Page 311 - Channels, till at lafl they all meet and form the Vena Cava, which opens into the right Auricle of the Heart.