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3. What will the above tannage amount to, at 16 dollars per ton ?

dols.

16 16

13

158

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

Anf, 2737 tons, Ee

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 inches ?

Ans, 209} tonsa

TABLES OF CORDAGE.

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

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

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At the top of the table, marked inches, fathoms, feet, inches, the first column is the thickness 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 desire to know how much of a seven-inch

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 , fathoms 5 feet 6 inches required to make one hundred weight.

rópe

1

Table shewing the weight of any Cable or Rope, of zo fathoms in length, and for every half inch, from 3 to 24 inches in cir. cumference.

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Use OR THE TABLE. The first column marked for inches, is the thickness or circumference of the cable to every half inch from 3 to 24 inches ; the second, marked Cwt. qrs. for the hundred weights and quarters that it will weigh if 120 fathoms in length.

For instance : Suppose it be a cable of 141 inches ; look against 141 and you will find in the other column 52 cwt. 2 qrs, which shews that 120 fathoms of 141 inch cable will weigh 52 cwt. 2 qrs, and fo in others : and any quantity of a less length will weigh in proportion.

A ship was brought to anchor in a gale of wind, but the gale increafing, it was thought safest to cut the cables, in consequence of which 75 fathomas of 16 inches and 50 fathoms of 12 inches were lost; what must they be valued at in calculating the average ; new cordage being then 14 dollars

per
cwt ?

CALCULATION. $20 fath. 16 in, cable=64 cwt. 120 fath. 12 in. cable=36 cwt.

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