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A

TREATISE

ON

ASTRONOMY,

IN WHICH

THE ELEMENTS OF THE SCIENCE

ARE DEDUCED

IN A NATURAL ORDER,
FROM THE APPEARANCES OF THE HEAVENS

TO

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 jabar

Terraque majores globos,
Et per cadentes iptucri lacrymas

Rimosa lucis atria!

CASIMIR.

LONDON:

PRINTED FOR G, KEARSLEY, FLEET-STREET ;
AND SOLD BY THE AUTHOUR, AND BY DEIGHTUN, IN CAMBRIDGE; BY

COOKE, AND BY HANWELL AND PARKER, OXFORD ; BELL AND PRAD-
FUTE, EDINBURGH ; BRASH AND REID, GLASGOW; BY BROWN AND
BY BURNETT, ABERDEEN; AND BY COLBEKT, DUBLIN,

1809.
[T. Davison, White-Friars.)

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