The Solar System, 1873
Relation of planets in the solar system....

Solar System, 1885
A chart of the solar system from 1885. This chart extends to the planet Neptune (discovered as a planet of the solar system in 1846), and shows the orbits of Halley's comet, Olber's comet, and the unnamed comet of 1882....

Position of the Earth, Moon, and Sun during Spring and Neap Tide, 1891
A diagram from 1891 showing position of the earth, moon, and sun during spring and neap tide. "When the sun and moon act simultaneously, on the same hemisphere of the earth, as shown in Fig. 74, the tidal wave is higher than usual. The flood tid...

Effect of Rotation, 1899
Map illustrates effect of Earth's rotation on our seasons if the direct sunlight from the Sun were on the Earth's axis at the poles....

Effect of Rotation, 1899
Map illustrates effect of Earth's rotation on our seasons if the direct sunlight from the Sun were perpendicular to the Earth's axis at the Equator. ...

Effect of Rotation, 1899
Map illustrates effect of Earth's rotation on our seasons at the Summer Solstice when the direct sunlight from the Sun falls on the Tropic of Cancer. This illustration shows the Earth's axis, North Celestial Pole and South Celestial Pole, the axial t...

Earth's Inclination of Axis, 1901
Map showing the inclination of the axis of the Earth....

Effects of Earth's Inclination, 1901
Map showing the effects of the inclination of the axis of the Earth. This illustration shows the effect of the amount of direct sunlight on portions of the Earth throughout each month of the year, including the equinox and solstice periods....

March Equinox, 1901
A diagram of the earth at the March equinox. During the March and September equinox, "the sun is exactly over the equator; hence the sunlight extends to the same distance on both sides of the equator, or to both poles. As the earth rotates in th...

Inclination of Earth on Solstices, 1901
A diagram from 1901 showing the Earth's angle of inclination on the summer and winter solstices. The inclination of the earth on the summer solstice (about June 21) is shown on the left, and on the winter solstice (about December 21) on the right. Th...