Elements of practical geometry, by the author of 'Arithmetic for young children'.

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Page 94 - TROY WEIGHT. 24 Grains (gr.) make 1 Pennyweight, dwt. 20 Pennyweights " 1 Ounce, oz. 12 Ounces "1 Pound, Ib. M APOTHECARIES
Page 62 - Parallelograms on the same base, or on equal bases, and between the same parallels are equal.
Page 94 - Weight. 20 grains, gr., make 1 scruple, 9 3 scruples 1 drachm, 3 8 drachms 1 ounce, 12 ounces 1 pound, Ib Apothecarie^ Wine Measure.
Page 95 - DIGGING. 24 Cubic feet of sand, or 18 cubic feet of earth, or 17 cubic feet of clay, make 1 ton. 1 Yard cube of solid gravel or earth contains 18 heaped bushels before digging, and 27 heaped bushels when dug.
Page 92 - MEASURE. 144 sq. Inches . . . .make 1 sq. Foot. 9 sq. Feet 1 sq. Yard.
Page 54 - ... 60. Having constructed the containing rectangle, draw diagonals by means of the set-square resting on its shortest side on the T-square. All lines drawn against the hypothenuse of the setsquare in this position will be at 60 to the horizontal lines and at 30 to the perpendiculars. Now divide tho base into the required number of equal parts, and draw lines from them parallel to both diagonals.
Page 89 - The general principle for finding the contents of cubic bodies is to multiply the length by the breadth, and the product by the thickness, but the rule applies directly only to the cube or right prism, being subject to modifications as applied to solid figures of other forms. See IT 51. 1. How many solid inches in a globe 7 inches in diameter ? NOTE 2. — The solid contents of a globe are found by multiplying the area of its surface...
Page 90 - The cubical content of a right circular cone is onethird of that of a cylinder on the same base and of the same altitude.
Page 89 - Since the content of any pyramid is equal to one-third of the content of a prism on the same base and of the same altitude, the contente of the four equal pyramids can be found, and the content, or volume, of the tetrahedron determined.
Page 17 - Any line from the centre to the circumference is called a radius, and a line through the centre to each side of the circumference is the diameter, or double the radius.

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