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c o N T A 1 N I N c,
I.
A comp RE HENsive view of THE

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III.
THE DESCRIPTION AND USE OF THE
ARMILLARY SPHERE, PLANETARIUM,
T E L L URI A N, a N D L UN A R I U M.

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MATHEMATICAL-INSTRUMENT MAKER To His MAJESTY, AND OPTICLAN TO HIS
ROYAL HIGHNESS THE PRINCE OF WALES.

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Printed for the AUTHOR, by R. HIND MARSH, Printer to His
Royal Highness the Prince of Wales, No. 32, Clerkenwell-Close;
and Sold at the Author's Shop, No. 60, Fleet-Street,

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FT H E connection of astronomy with geo* graphy is so evident, and both in conjunětion so necessary to a liberal education, that no man will be thought to have deserved ill of the republic of letters, who has applied his endeavours to diffuse more universally the knowledge of these useful sciences, or to render the attainment of them easier; for as no branch of literature can be fully comprehended without them, so there is none which impress more pleasing ideas on the mind, or that afford it a more rational entertainment.

The fifth edition of my father's treatise on the globes being out of print, I was solicited to reprint it. To obviate several objections to the t form form in which he had disposed the problems, I was induced to undertake the present work, in which they are arranged in a more methodical manner, and a great number added to them. Such facts are also occasionally introduced, and such observations interspersed, as it is presumed will excite curiosity, and fix attention.

Having proceeded so far in this work, I found that it was easy to render it subservient to my plan of publishing, from time to time, “Essays, Describ ING THE Use of MATHEMATICAL AND PHILosophical, INSTRUMENTS:” for the description of those which have been contrived to smooth the path to the science of astronomy, could no where be introduced with so much propriety, as in a work which treated of it's elementary principles,

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