This is the ufual method of tonnaging a fingle-decked veffel, having the deck bolted to the wale. But if it be required that the deck be bolted at any height above the wale, the cuftom is to pay the carpenter for one half of the additional height, to which the deck may be thus raised; that is, one half of the difference being added to the former depth, gives the depth to be used in calculating the tonnage. EXAMPLE. A merchant, after having contracted with a carpenter to build a fingle-decked veffel of 60 feet keel, 20 feet beam, and 8 feet hold, defires that the deck be laid for 10 feet hold; required the tonnage to be paid for. 60 length. RULE. For a double-decked veffel, take half the breadth of the main beam for the depth of the hold, and work as for a fingle-decked veffel. EXAMPLES. 1. What is the tonnage of a double-decked veffel, whofe length is 65 feet, and breadth 21 feet 6 inches ? 2. What will the above tonnage amount tó, at 16 dollars per ton ? 3. Required the tonnage of a fhip of 74 feet keel, and 26 feet 6 inches beam. E e Anf. 273 tons. To find the Government Tonnage. "If the veffel be double-decked, take the length thereof from the fore part of the main stem, to the after part of the fternpoft, above the upper deck; the breadth thereof at the broadest part above the main wales, half of which breadth fhall be accounted the depth of fuch veffel, and then deduct from the length, three fifths of the breadth, multiply the remainder by the breadth, and the product by the depth, and divide this last product by 95, the quotient whereof fhall be deemed the true contents or tonnage of fuch fhip or veffel; and if such ship or veffel be fingle-decked, take the length and breadth, as above directed, deduct from the faid length three fifths of the breadth, and take the depth from the under fide of the deck plank, to the ceiling in the hold. then multiply and divide as aforefaid, and the quotient fhall be deemed the tonnage." EXAMPLES. 1. What is the government tonnage of a fingle-decked veffel, whofe length is 69 feet 6 inches, breadth 22 feet 6 inches, and depth & feet 6 inches ? What is the government tonnage of a double-decked veffel, of the following dimenfions, length 75 feet 6 inches, breadth 23 feet inches, and depth 11 feet 8 inches? feet in. 4 feet in: 75 6 Or, 75 6 14 o for breadth 14 O 3. What is the government tonnage of a double-decked vessel, of the following dimenfions, length 82 feet 3 inches, breadth 24 feet 3 inches, and depth 12 feet 1 inches ? Anf, 2096 tons. 1 TABLES OF CORDAGE. A Cordage Table, fhewing how many fathoms, feet, and inches of a rope of any fize, not more than 14 inches, make à hundred weight: with the ufe of the table. At the top of the table, marked inches, fathoms, feet, inches, the first column is the thicknels of the rope in inches and quarters, and the other three the fathoms, feet, and inches that make up a hundred weight of fuch a rope. One example will make it plain. Suppose you defire to know how much of a feven-inch rope will make a hundred weight: Find 7 in the third column under inches, or thickness of rope, and against it in the fourth column you find 9 5 6, which fhews that there will be 9 fathoms 5 feet 6 inches required to make one hundred weight. |