THE

CONTENTS.

Page

A Comprehensive view of the solar system I

The orbits of the planets 4

Mercury H

Venus 7

Elongation of the planets 8

The earth 13

Our summer longer than the wintef 19

Mars, Jupiter, and Saturn 21

The Moon 27

Satellites of Jupiter and Saturn 31

Parallax of the heavenly bodies 33

Refraction of the atmosphere 40

Solar and lunar eclipses 41

Artificial globes, terrestrial and celestial, what 47The broad paper circle on the surface of thewooden frame described 52

Problem I. To find the sun’s place 53

The strong brass circle, or meridian 56

The horary circle 58

The motion of the terrestrial globe 60

of the celestial globe 60

Thin brass semi-circle 60

The brass quadrant of altitude 61

[ b J The