...— Two observers are situated, we shall suppose, at either extremity of a diameter of the earth, say one at the north pole, and the other at the south pole. When therefore the planet Venus passes across the sun's disc, these observers will see the planet projected...

...effects of this alteration of shape may be obtained by substituting for these variations of elliptioity two attractive or repulsive particles, one at the...extreme case when the obliquity is 90° ; this makes the fortnightly tide as large as possible. Let the plane of the paper be that of the ecliptic, and let...

...effects of this alteration of shape may he obtained by substituting for these variations of elliptioity two attractive or repulsive particles, one at the...now take the extreme case when the obliquity is 90° j this makes the fortnightly tide as large as possible. Let the plane of the paper be that of the ecliptic,...

...when the moon is in her nodes, and least when she is 90° removed from them. In a lagging fortnightly tide the ellipticity is greatest some time after the...extreme case when the obliquity is 90° ; this makes the fortnightly tide as large as possible. Let the plane of the paper be that of the ecliptic, and let...

...horseshoe type of electromagnet is invariably employed, and as there are then two contact surfaces, one at the north pole and the other at the south pole, the total number of lines of force developed are used twice in causing the traction. If the contact...

...past ages. Frank Taylor hypothesized that about 100 million years ago, two large continents existed, one at the North Pole and the other at the South Pole. He proposed that the Moon was much closer to Earth then — so close that it exerted a gravitational...