Ex. 2. Required the weight of a log of oak 24 feet long, broad, and 1 foot thick. Anf. 18 cwt. 2 qrs. 9 lb. 4 oz. Ex. 3. How many deals fir will a ship of 400 ton burden carry, each being 16 feet long, 9 inches broad, and 6 inches thick? Ans. 4344 8 Ex. 4. A ship of 300 tons burden carries 96 flabs marble, each 10 feet long and 6 feet broad; it is required to find the thickness. Anf. 8.296 inches. PROBLEM PROBLEM V. To find the magnitude of bodies from their weights. RULE. Divide the weight of the body in averdupois ounces by the tabular specific gravities, for the number of cubic feet. Or fay, As the specific gravity of the body Is to its weight, So is I cubic foot To the folidity in feet. EXAMPLE I. How many cubic feet are in a ton weight of fir? 550:35840::1:65 Ex. 2. How many cubic feet are in a ton-weight of brass? Ans. 4.48. Ex. 3. How many cubic feet in a block common stone, Ans. 113 feet. whose weight is 8 ton? BALLS AND SHELLS. PROBLEM I. To find the weight of a shell, the external and internal diameters being given. RULE. MULTIPLY the difference of the cubes of the diameters in inches by .14, and the product gives the answer in pounds nearly. EXAMPLE I. Required the weight of an iron shell, whose external and internal diameters are 9 and 7 inches. 1 Ex. 2. What is the weight of an iron shell, the external and internal diameters being 13 and 94 inches. Ans. 187.54625 lb. Ex. 3. Required the weight of an iron shell, the diameters being 8 and 10 inches. Anf. 68.32 lb. Ex. 4. Required the weight of an iron shell, whose diameters are 10 and 8 inches. Anf. 90.3875 lb. PROBLEM II. To find how much powder will fill a shell. RULE. Divide the cube of the internal diameter in inches by 57.33 the quotient gives the pounds in powder. EXAMPLE I. What weight of powder will fill a shell whose internal dia meter is 7 inches ? 7 7 49 57-3)343.0(5.986 lb. 5650 5157 4930 4584 3460 3438 22 |