of it is enlightened, by the Sun, in every Part of her Orbit.

Again, by means of these two Globes, the Doctrine of Eclipses, and of the Tides, may be tolerably well illustrated.

And if the leffer Globe be carried round the Candle, either further off than the Earth, to represent a superior Planet; or nearer, to represent an inferior one; it may easily be fhewed, how the Planets will fometimes appear Weftward of the Sun, fometimes Eastward; and, confequently, how they are fometimes Morning Stars, fometimes Evening Stars to the Earth.

In the Third Part of the enfuing Treatife, which shews the Application of Aftronomy to Chronology, I have inferted several memorial Canons, adapted to the Gregorian Style, for most of which I am obliged to Mr. John Canton, M. A. and F. R. S. all those, and the Explications of them, which are marked with an Afterism are His.

The Hypothefis in the Appendix is, for ought I know, entirely new. I offer it as an Hypothefis. It is fatisfactory to my own Mind; whether it will appear fo to others, I must leave with my readers.

CON

THE

CONTENTS.

PART

I.

The Doctrine and Ufe of the Globes.

A

Defcription of the Globes; particu-

larly of the Terreftrial Globe, its

Points and Circles.

II. Of the Divifions of the Earth

III. A Defcription of the Celestial

Points and Circles

Page I

ΙΟ

Globe, its

15

IV. Of the Divifions of the Heavens, and the

Conftellations

V. The Ufe of the Globes

21

28

The Solar Syftem, and the Ufe of the Orrery.

IV. Of the Moon

64

V. Of the Eclipfes of the Sun and Moon 73

VI. The Doctrine of the Tides

79

VII. Of the Planets Mercury, Venus, Mars,

Jupiter, and Saturn

VIII. Of Comets

85

98

X. Of Parallaxes

IX. Of the Equation of Time

104

114

XI. Of the Fixed Stars

117

APPENDIX, attempting to Explain the Ac-

count of the First and Fourth Days Work

of Creation, in the First Chapter of GE-

NESIS.

151

An

An EXPLICATION of fome Algebraic, and other Characters, ufed in this Вook.

S the Sign of Equality, and is read equal, as 3 and 25, fignifies 3 and 2 are equal to 5.

Is the Sign of Addition, and is read plus, or more, as 4+2, fignifies 4 more 2, or 2 added to 4,

= 6.

-

Is the Sign of Subftraction, and is read minus, or lefs, as 9-2, Sgnifies 9 lefs 2, or 2 fubftracted from

9,=7.

x Is the Sign of Multiplication, as 4× 3 fignifies 4 multiplied by 3,

12.

Is the Sign of Divifion, as 123 fignifies 12 divided by 3,

4.

Degrees are fometimes expreffed by a little Circle over the right Hand Corner of a Figure, as 5° ftands for Degrees.

Minutes, by a fingle Stroke, as 5' ftands for 5 Mi

nutes.

Seconds, by 2 Strokes, as 5" ftands for 5 Seconds.

THE

CHAPTER I.

A Defeription of the Globes; particularly of the Terreftrial Globe,

its Points and Circles.

A

GLOBE or Sphere fignifies a round Body, every Part of whofe Surface is equally diftant from its Center.

BY THE GLOBES, which we are now to treat of, we mean two fuch artificial fpherical Bodies, one of which is fuppofed to represent the Earth, and the other the vifible Heavens. The former is called the Terreftrial or Terraqueous Globe, the latter the Celestial.

B

Half