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The GREAT ORREent forts
Four Feet in Diameter Made in THO: WRIGHT Mathematical Inft ment-maker TO HIS MAJESTY
Description and Ufe
To which is prefixed,
By way of INTRODUCTION, a
By JOSEPH HARRIS.
The SECOND EDITION.
Printed for THOMAS WRIGHT, Mathematical In-
R. WRIGHT has lately made feveral very large ORRERYS, with all the Motions of the primary and fecondary PLANETS, which makes the Price very great: But being willing that Academies, Schools, &c. fhould have the Benefit of this useful Machine, he has contrived an ORRERY, which exhibits what relates to the Motions of the Sun, Earth and Moon; to be fold at a very moderate Price.
He also has great Choice of Mathematical Inftruments ready made by him; as Cafes for Drawing, Surveying Inftruments, Sun-Dials, Weather-Glaffes, &c.
F the Order, and Periods of the Pri-
mary Planets revolving about the Sun;
and of the Secondary Planets round their re-
Of the Annual and Diurnal Motion of the Pla-
That the Planets are Opaque and Globular.
-That the Earth is placed betwixt the Orbits of
-That the Planets turn round the Sun.
-That the Earth also turns round the Sun.
How the Annual and Diurnal Motions of the
How the Relative Distances of the Planets from
How their abfolute Distances from the Sun are
How the Magnitudes of the Planets are deter-
ATable of the Distances, Magnitudes, Periodical
and Diurnal Revolutions of the Planets.
-That the fixed Stars are luminous Bodies, at im-