Ex. 2. Required the weight of a log of oak 24 feet long, 1 broad, and 1 foot thick. Anf. 18 cwt. 2 qrs. 9 lb. 4 oz. Ex. 3. How many deals fir will a fhip of 400 ton burden carry, each being 16 feet long, 9 inches broad, and 6 inches, thick? Anf. 4344 T Ex. 4. A fhip 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 358401: 65325 Ex. 2. How many cubic feet are in a ton-weight of brass? Anf. 4.48. Ex. 3. How many cubic feet in a block common ftone, whofe weight is 8 ton? Anf. 113 feet. A BALLS AND SHELLS. PROBLEM I. To find the weight of a fhell, 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 fhell, whofe external and internal diameters are 9 and 7 inches. Ex. 2. What is the weight of an iron fhell, the external and internal diameters being 13 and 9 inches. Anf. 187.54625 lb. Ex. 3. Required the weight of an iron fhell, the diameters being 8 and 10 inches. Anf. 68.32 lb. Ex. 4. Required the weight of an iron fhell, whofe diameters are 10 and 8 inches. Anf. 90.3875 lb. PROBLEM II. To find how much powder will fill a fhell. 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 fhell whofe internal dia meter is 7 inches? 7 7 49 7 57-3)343-0(5.986 lb. 5650 5157 4930 4584 3460 3438 22 |