# A Mathematical Manual: Containing Tables of Logarithms for Numbers, Sines, and Tangents. With the Manifold Use Thereof Briefly Explained and Applied in Arithmetick, Geometry, Astronomy, Geography, Surveying, Navigation, Dialling, Gunnery, and Gauging

A. Clark, 1677 - Gaging - 201 pages
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Page 168 - The right Range of every Piece being difcharged in a Level or Parallel to the Horizon is fet down in the forgoing Table, in which the Cannon exceeds not i85 Pace:., that is 5 Fo<^< to each Pace.
Page 160 - Thirdly, Double fortified Pieces, or Extraordinary Pieces. This Fortification is reckoned by the thicknefs of the Metal at the Touch- hole, at the Trunnions, and . at the Muzzle, in proportion to the Diameter of the Bore. The Cannons double fortified...
Page 168 - Motions are confidered apart , or elfe joined together j but they are both of them fomwhat the longer, according as the Piece is mounted higher from the Level to the Angle of 45 degrees, which is the...
Page 161 - Ordnance, which will not endure fo much Powder as Brafs Guns by one Quarter. For Culverings the whole weight of their Shot for Proof...
Page 155 - Light-mark , as fhc fwims being ualaden, you fiiall have the weight or content of the empty Ship •> and if you meafure from this Light- mark to her full draught of Watet being ladehg, that will be the true Burden or Tunnageof the Ship.
Page 133 - Poles the other, What is the Content ? Multiply the length 40 by the breadth 30, it makes 1200 > which divide by 203 Д, it yields 5 Acres, 3 Roods, 23 Perches.
Page 132 - Multiply both the Perpendiculars by half the Diagonal Line, which is the common Bafe of both the Triangles, and divide by 1 60. ībiu let the t>iagettal-Kne be 40, me of the Perpendiculars 1 \$,ibe other 8 } tbe/č tats added together niak...
Page 162 - Shot, that fo a third part of the Compafs may be left open, for the Powder to fall freely out of the Ladle when you turn it the bottom upwards.
Page 140 - Take the compafs thereof with a ftring,and then meaiuring the firing by your Ruler, fee how many Inches the Tree is in Compafs, and then find thofe Inches in the...
Page 163 - It is more rational and artificial to divide the Bore of the Gun into 20 equal parts, and let the Diameter of the Bulkt be i \$ of thofe parts, according to which proportion the Table is calcu* latcd.