The young gentleman's astronomy, chronology, and dialling, containing such elements of the said arts or sciences, as are most useful and easy to be known / [Edward Wells].

Edward Wells

Date:: 1725

Credit: The young gentleman's astronomy, chronology, and dialling, containing such elements of the said arts or sciences, as are most useful and easy to be known / [Edward Wells]. Source: Wellcome Collection.

86/370 page 58

$when fhe is entring on that Part of her Orbit , which inclines northward from the Eckptick ; and Hie croffes the Dragon’s Tail, when {lie is en¬ tring on that Part of her Orbif] which inclines Southward from the Ecliptick, Now the Nodes being the only two Points, where the Moon croffes the Ecliptick, hence there can be no E- clipfe of the Earth, but when the Moon happens to Change in or near one of the Nodes ; becaufe in this Cafe only, the Moon at her Change comes fo between the Earth and the Sun, as to intercept the Rays of the Sun, and keep them from the Earth. And in like manner, there can be no Eclipfe of the Moon, but when the Moon happens to be at Full, in or near one of the Nodes; becaufe in this Cafe only, the Earth comes fo between the Moon and the Sun, as to intercept and hinder the Rays of the Sun from falling on the Moon. 4. In an Eclipfe of the Earth , the The ska - Moon by intercepting the Rays of Sc/kfly * t^e Sun, caffs a Shadow on the Earth* the sm And in an Eclipfe of the Moon, the tf^Jh-T9 by intercepting the Rays of the Figure? Sun, caffs a Shadow on the Moon. r Thefe$