Transcriber’s Notes: Underscores “_” before and after a word or phrase indicate _italics_ in the original text. Small capitals have been converted to SOLID capitals. Old or antiquated spellings have been preserved. Typographical errors have been silently corrected. [Illustration: The GREAT ORRERY Four Feet in Diameter _Made by_ THO: WRIGHT _Mathematical Instrument-maker_ TO HIS MAJESTY For the Royal Academy at PORTSMOUTH Now B. Cole, _at the same shop_. Who makes Orrery’s of different sorts _as may be seen at his Shop in_ FLEET STREET _Where is Sold a Large Print of the Orrery with the Explanation on a Sheet of Imperial Paper._ Price 2s.] THE Description and Use OF THE GLOBES, AND THE ORRERY. To which is prefix’d, By Way of INTRODUCTION, A brief Account of the SOLAR SYSTEM. By JOSEPH HARRIS, TEACHER of the MATHEMATICS. THE ELEVENTH EDITION. _LONDON_: Printed for B. COLE, at the _Orrery_, near the _Globe Tavern_, in _Fleet street_, late the Shop of Mr. THOMAS WRIGHT, Instrument-maker to his late MAJESTY; and E. CUSHEE, near St. _Dunstan_’s Church, _Fleet Street_. MDCCLXXIII. Advertisement. The great encouragement Mr. WRIGHT has had for many years past in making large _Orreries_, with the motions of all the Planets and Satellites, and the true motion of _Saturn_’s Ring, has made him so ready and perfect, that Gentlemen may depend on having them made reasonable and sound, not liable to be out of Order. As may be seen by one he made for Mr. _Watt_’s Academy in _Tower-street_. Another for his Majesty at _Kensington_. Another for the New Royal Academy at _Portsmouth_. Another for his Grace the Duke of _Argyle_ (late Lord _Ila_.) And several other large ones for Noblemen and Gentlemen. The above, and all other Mathematical, Philosophical, and Optical Instruments, are now made in the most complete manner, by B. COLE, Servant to Mr. WRIGHT, at the time of the above being made, and successor to him in the same Trade and Business. THE CONTENTS. _The_ INTRODUCTION: _Containing a brief Account of the Solar System, and of the Fixed Stars_. SECT. I. _Of the Order and Periods of the Primary Planets revolving about the Sun; and of the Secondary Planets round their respective Primaries._