 | Walter Henry Burton - 1828 - عدد الصفحات: 84
...no small mystery is involved. For if you take the number sixty, (which I stated to represent nearly the mean distance of the moon from the centre of the earth, estimated in semidiameters of the earth,) and multiply it twice by itself, the product is 216,000;... | |
 | Joseph Denison - 1846 - عدد الصفحات: 106
...the circumterrestrial force decreases in the duplicate proportion of the distances, I infer thus: " The mean distance of the moon from the centre of the earth is, in semidiameters of the earth, according to Ptolemy, Kepler in his Ephemerides, Bullialdus, Hevelius,... | |
 | T. Baker - 1851 - عدد الصفحات: 160
...Formula used in the article on water wheels, and in various other parts of this work. See Moseky's Principles of Engineering and Hann's Mechanics. The...moon, which causes it to revolve round the earth in 27-y days, the earth being assumed to be at rest. By Art. 275, . f 4ir2R 4 x3-14162x 4000x5280 /= ~TP-... | |
 | T. Baker - 1851 - عدد الصفحات: 172
...The following are given to illustrate the preceding propositions and their corrolaries. 284. PEOB. 1. — Taking the radius of the earth to be 4000 miles,...the earth being assumed to be at rest. By Art. 275, 4» 2 R 4 x3-1416 2 x 4000x5280 „ „ ^ 271x24x60x60 fect . And since the force of gravity at the... | |
 | Alfred Wilks Drayson - 1862 - عدد الصفحات: 342
...often as it does every year, to perform, its annual course : the radius of the small circle is nearly the mean distance of the moon from the centre of the earth. Thus if we considered the earth the nave, and the moon's orbit the tire of a wheel, then this wheel... | |
 | William Henry Bayley (arithmetician.) - 1864 - عدد الصفحات: 202
...Conversion of Arc into Time. (See page 41). Conversion of Longitude into R.Â. (See page 48). The Moon. The Mean, distance of the Moon from the centre of the Earth is 237630 miles, or nearly 60 radii of the Earth, so that it is sensibly nearer when on the Zenith.... | |
 | William Guy Peck - 1883 - عدد الصفحات: 406
...augmentation of the moon's semi-diameter, obviously increases as she approaches the zenith of the observer. The mean distance of the moon from the centre of the earth is a little more than 60 times the terrestrial radius; hence,-her mean distance from that point of... | |
 | De Volson Wood - 1903 - عدد الصفحات: 404
...moon in its orbit. The mean time of the periodic motion of the moon is T = 2,360,585 seconds ; and the mean distance of the moon from the centre of the earth is 60.361 Jt, in which R is the mean radius of the earth. Calling H — 20,897,500 feet and substituting... | |
 | Sir William Cecil Dampier Dampier, Margaret Dampier Dampier - 1924 - عدد الصفحات: 312
...circum-terrestrial force likewise decreases in the duplicate proportion of the distances, I infer thus. The mean distance of the moon from the centre of the earth, is, in semi-diameters of the earth, according to Ptolemy, Kepler in his Ephemerides, Bullialdus, Hevelius... | |
 | Sir William Cecil Dampier Dampier, Margaret Dampier - 2003 - عدد الصفحات: 312
...circum.terrestrial force likewise decreases in the duplicate proportion of the distances, I infer thus. The mean distance of the moon from the centre of the earth, is, in semi .diameters of the earth, according to Ptolomy, Kepler in his Ephemerides, Eullialdus, Hevelius... | |
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... Their distances, according to Kepler and Bullialdus, scarcely differ by any sensible quantity, and where they differ most the distances drawn from the periodic times fall in between them. That the circum-terrestrial force likewise decreases in the... 