A

TREATISE

ON

ASTRONOMY,

IN WHICH

THE ELEMENTS OF THE SCIENCE

ARE DEDUCED

IN A NATURAL ORDER,

FROM THE APPEARANCES OF THE HEAVENS

то

AN OBSERVER ON THE EARTH;

DEMONSTRATED

ON MATHEMATICAL PRINCIPLES;

AND EXPLAINED

BY AN APPLICATION

то

THE VARIOUS PHENOMENA.

BY OLINTHUS GREGORY,
TEACHER OF MATHEMATICS, CAMBRIDGE,

Idem, propinqua nocte, stellatas vigil
Cum vesper accendit faces,

Ut gaudet immortale mirari jubar
Terraque majores globos,

Et per cadentes intueri lacrymas
Rimosa lucis atria!

CASIMIR,

LONDON:

PRINTED FOR G. KEARSLEY, FLEET-STREET;

A

AND SOLD BY THE AUTHOUR, AND BY DEIGHTON, IN CAMBRIDGE; BY
COOKE, AND BY HANWELL AND PARKER, OXFORD; BELL AND BRAD-
FUTE, EDINBURGH; BRASH AND REID, GLASGOW; BY BROWN AND
BY BURNETT, ABERDEEN; AND BY COLBERT, DUBLIN,

1802.

[T. Davison, White-Friars.]

}

To

CHARLES HUTTON, Esq. LL.D. F.R.S.

Professor of Mathematics

In the Royal Military Academy, Woolwich:

In Testimony

Of Admiration and Esteem

For the eminent Talents and Genius

He has so frequently and usefully displayed

In his public Capacity;