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This is the usual method of tonnaging a fingle-decked veffel, having the deck bolted to the wale. But if it be required that the dock bo bolted at any height above the wale, the custom is to pay the car. penter 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 contrated with a carpenter to build a single-decked vessel of 60 feet keel, 20 feet beam, and 8 feet hold, delires that the deck be laid for 10 feet hold ; required the tonnage to be paid for.

60 length.
20 breadth.

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Rule. For a double-decked vessel, take half the breadth of the main beam for the depth of the hold, and work as for a fingle-decked vefsel.

EXAMPLES. 1. What is the tonnage of a double-decked vessel, whose length is 65 feet, and breadth 21 feet 6 inches ?

65
length.

95)15023 1(15811 21 6 breadth.

95

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The preceding question may be wrought thus :

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. What will the above tonnage amount tó, at 16 dollars per ton ?

dols. 158

16 i6

13

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Ans. 2530 dols. 18 cents.

90 3. Required the tonnage of a ship of 74 feet keel, and 26 feet 6 inches beam.

Anf. 2734 tons, Еe

To find the Government Tonnage.

“ If the vessel be double-decked, take the length thereof from the fore part of the main stem, to the after part of the sternpost, above the upper deck ; the breadth thereof at the broadest part above the main wales, half of which breadth shall be accounted the depth of such vessel, 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 shall be deemed the true contents or tonnage of such fhip or vessel ; and if such ship or vessel be single decked, take the length and breadth, as above dire&ed, deduct from the laid length three fifths of the breadth, and take the depth from the under side of the deck plank, to the ceiling in the hoid. then multiply and divide as aforesaid, and the quotiert shall be deemed the tonnage."

EXAMPLES. What is the government tonnage of a single-decked veffel, whose length is ég feet 6 inches, breadth 22 feet 6 inches, and depth 8 feet 6 inches ?

feet in.

69 6 length 22 6 breadth dedućt 13 6 for breadth

3

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What is the government tonnage of a double-decked vessel, of the following dimensions, length 75 feet 6 inches, breadth 23 feet 4 inches, and depth 11 feet 8 inches?

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3. What is the government tonnage of a double-decked vessel, of the following dimensions, length 82 feet 3 inches, breadth 24 feet 3 inches, and depth 12 feet 1 inches ?

Anl, 2093 tonsa

TABLES OF CORDAGE.

4 Cordage Table, Shewing how many fathoms, feet, and inches of a

Tope of any fize, not more than 14 inches, make a hundred weight; with the use of the table.

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At the top of the table, marked inches, fathoms, feet, inches, the first coluinn 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 such a rope. One exarople'will make it plain. Suppose you desire to know how much of a seven-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 shews that there will be

9
fathoms

5 feet 6 inches required to make one hundred weight,

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