File:The young gentleman and lady's philosophy - in a continued survey of the works of nature and art by way of dialogue (1759) (14595268279).jpg

Identifier: younggentlemanla02mart (find matches)
Title: The young gentleman and lady's philosophy : in a continued survey of the works of nature and art by way of dialogue
Year: 1759 (1750s)
Authors: Martin, Benjamin, 1704-1782
Subjects: Science
Publisher: London : Printed and sold by W. Owen and by the author
Contributing Library: University of Pittsburgh Library System
Digitizing Sponsor: University of Pittsburgh Library System

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Text Appearing Before Image:
e con-ceived as (landing on the fame Bafes with the Hemifphere, thatis, on the Equator, the Surface of fuch a Cone would in Partlie within the Surface of the Globe ; and then, nothing can beeafier than to fuppofe that the Surface of the Globe, at fo fmalla Diftance from the Surface of the Cone, might be very eafilyprojedted and delineated upon it; and in fuch a Cafe, the Pro-portion of the Countries and their Bearings, Diftances, &c.will be nearly the fame on the^Surface of the included Part ofthe Cone, as on that of the Globe itfelf; and when fuch ageographical conic Surface is cut out, and expanded, it makesthe Map which you have in your Hands. ■ The principal Peculiarities of this Map are as follows, I. All the Meridians are right Lines, but converge towardsthe Vertex of the Cone, as the circular Meridians on the Globeconverge towards the Pole. II. The Diftances, North and South, are exaft; and anyMeridian will fer-ve as a ^b, to meafure thefe Diftances by, in Vol. II. T this
Text Appearing After Image:
*^/ie^ua/ Zone (m tk j Jccrfiu:^ of a Co27E JnventeJ ly Xn^raud far fk* General Mt^^(ttr, of ylrbf r Sdeneey-fit* JT Chuen at Tempt* Bar fj^. and Ladys Philosophy. ,137 JPrefent of it, as I wifh to have nothing new or curious go be-iide you, or come to you at Second-hand. Euphrof. Pray, let me look at it. It feems to be an elegant Defign, and differs manifeftly from the Appearance ofother Maps ; but in fuch Particulars, as I caa hardly tell what they are. I fee it is very capacious, and takes in large Trads of the Continent of Europe^ Afia^ and Africa^ on oneSide, and of North America and the Wejl-Indm on the otherSide, with a View of all the Atlantic Ocean between them ; andyet, methinks, the Map is not large for fuch an extenfiveView. Cleon. There is fomewhat very finguhr in the Conftrudion, as well as the Form of this Map. Would you ever have thought of a Reprefentation of the Surface of the Globe, by aPart of the Surface of a Cone ? And yet you will eafily under-iland that this is

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