PART XIII. BRIDGES, AND PONTOONS. BRIDGES.-1. To find the number of planks to form a float 2. To find the number of casks to form a raft Decimals.-Addition Subtraction. Multiplication. Division Table of Weights, and Measures; English, and French Involution, or Raising of powers Evolution, or Extracting roots To find the number of balls in a complete pile number of balls in an incomplete pile Cordage. To find weight, and strength of a rope - Iron Rods. To find the weight of round, and square iron rods. 291 To divide a line into two equal parts. To bisect an arc Quantities of two ingredients in a compound Diameter of a sphere, or globule Table showing the Weight of a cubic foot of materials Density. Velocity. Momentum.. Force. Gravity To inscribe a pentagon, hexagon, or decagon, in a circle To find the angles at the centre, and circumference of a polygon To measure long irregular figures To find the number of square acres, &c., in preceding figures diameter, and circumference of a circle. the area of a regular polygon 'the area of a circle the area of a circular ring the length of any arc the area of a sector, of a segment. " of a semicircle, ellipse, parabola, &c. Mensuration of Solids. Definitions To find the superficies of a prism, or cylinder surface of a pyramid, or cone surface of the frustrum of a pyramid, or cone of a figure, having a part bounded by a curve . 324 solidity of the frustrum of a cylinder 324 content of a pyramid, or cone 325 solidity of the frustrum of a cone, or pyramid weight of a leaden ball 327 diameter of an iron shot 327 diameter of a leaden ball 327 weight of an iron shell. 328 quantity of powder to fill the chamber of a mortar, size of a shell to contain a given weight of powder quantity of powder to fill a cylinder length of a cylinder, or bore of a gun to be filled by 329 329 Table, showing the Reduction in feet; &c., upon 100 feet, at angles of elevation, and depression 341 Table, showing the rate of Inclination of inclined planes, for angles of elevation 342 Surveying, and Reconnoitring. Heights, and Distances 342 Methods of ascertaining Heights. 342 12. By eyesight, to estimate distances, in the field To traverse Roads By means of the Reconnoitring protractor, &c. Sound. Velocity of, &e. To ascertain the distance, by the report of fire-arms Reconnoitring. Memoranda Nature of each District, &c. Rivers, &c. Bridges Camps, and Positions 350 350 351 351 352 352 .* 353 354 with bayonet Weight Bullet. Weight. Diameter The Rifling is 3 grooves and one turn in 6 ft. 6 in. Charge of Powder, drams F. G. 2 feet. 8 lb. 3 oz. 530 gr. Weight of 20 Rounds, with 25 Caps. 1 lb. 11 oz. 2 drams. 2. Enfield Rifle Musket: 1853 Pattern. 1 |