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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1771 edition. Excerpt: ... Arch 1CB is lefs the required Side B C is proved to be not ambiguous. CASE V. Given the Angles A and B, with the oppoftte Side AC the fame as before in the loft Cafe; to find the included Side AB. (Fie. 40, 41.) I. By ftereographic Projection. Projeft the Triangle by Cafe 4; fo will 4B meafured, = 72 28'.. 2. Logarithmically. By Cafe i of right-angled Triangles, Radius: Cof.. 29 31' Tan. AC 41: Tan. CASE XII. j t Ghenalltbe 3 Angles, -viz. A = 29 31', B = 30 33', and C = 132 22'; to find a Side AC. (Fio. 40,41.) r. By ftereographic Projection. The Angles being converted into Sides, project the Triangle, as by the laft Cafe; fo will AC meafured, As A, B arc of the fame Affection, the Perp. falte within the Triangle, otherwife without. BOOK VI. A S T R O N O M t. A Stronbmy hath its Derivation from the two Greek JL. Words After, a Star, arid Nomos, a Law; for by it we are taught the Motions? the Sun, Mbdn nd Stars, and whatever in any wife pertains to them.; 2. Before we proceed to perform Conthafiottt iif Aftronomy, it is requifite to know the Saw's Place in the Ecliptic, the Latitude of the Place/ and thd'Sun'ii greateft Declination, that Is, theiAngla that th$ Sun's Orbit (the Ecliptic) rndkes with-' the Ecjforhoftial. 3. The Sun's Place in the Ecliptic is w be okh'raed from aftronomical Tables, which I have here inferted; whofe Ufes are evident fronv th'd Examples in ProB. i. 4 The Header muft not expeft, thai! this fliall be a full and complete Courfe of Aftponie, but only' a CollecYion of the moft ufeful agronomical Problems, necefTary to be known by every Pigffon1, who vrould defervedly acquire the Name arid Character of an able Surveyor. SECT SECT. L Astronomical Problems, requifite to be known In fie Practice of Pros. I...1 To...

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