To find the tunnage of vessels.

RULE. "Multiply the length of the keel by the breadth on the main beam, multiply this product by the depth, (all taken in feet,) and divide the laft product by 95 ̊ for the tunnage of a fingle-decked veffel if the veffel be double-decked, half the breadth on the main beam is used as the depth (above) in finding the tunnage."

NOTE The weight of a ships burthen is computed to be half the weight of water she can hold, of the same kind she swims in. A vessel will carry about 3 more in the ocean than in pure water.

100

EXAMPLES.

What is the tunnage of a fingle decked veffel whose length is 60 ft breadth 20 ft and depth 8 ft?

What is the tunnage of a double decked veffel, whose length is 65 ft and breadth 21,4 ft ?

95)14883,7(156,67 tuns. A.

"To find the government tunnage.

RULE. "If the veffel be double-decked, take the length thereof from the fore part of the main stem, to the after part of the stern poft, 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 shall be deemed the true contents or tunnage of such ship or veffel; and if fuch fhip 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 underfide of the deck plank, to the ceiling in the hold, then multiply and divide as aforefaid, and the quotient fhall be deemed the tunnage."

What is the government tunnage of a double-decked veffel, whofe length is 75 ft. 6 in. breadth 23 ft 4?

length 75 6-14 ft (3 of breadth)=61 6 x 23 4 breadth= 1435, x 11 8( br.) 16741 8, 95-176; tuns A.

12

"To take the dimensions of veffels, by carpenter's measure.

Measure the length by beginning at the aftermoft fide of the stern post, in a line with the rabbet of the garboard streak, and measure by the rabbet continuing this line forward until a fquare from it will meet the fore part of the main stem, immediately under the bowfprit; this gives the extreme length. The width is taken by measuring from outfide to outfide at the main beam, or greatest breadth at the bottom of the black. ftreak just above the main wales. The depth of hold is taken from the under fide of the deck at her main hatch-way to the top of the limber plank by the kelson. The above di-mensions are taken in feet.

To find the tunnage from the above admeasurement:

Deduct of the breadth from the extreme length, then multiply the remainder by the whole breadth, and if a single: deck multiply this by her depth of hold; if a double deck, take half the breadth of beam for the depth of the hold and multiply as for a fingle deck.

"

What is the tunnage of a veffel whofe extreme length is». 90 ft, breadth 25 and depth of hold 10?

EXCHANGE. coffe house

EXCHANGE is the bartering or felling of the money or value of one country for the like value in the coin, weight or meafure of another.

The value of any fubftance is ufually computed in money, familiar to the owner, of which, as of weights and measures, there are two kinds, real and imaginary.

Real money, weights and measures are fuch as are known by fight or their real intrinfic value, gravity or capacity; as, a dollar, pound, gallon, &c. and their real divifions.

Imaginary money, weights and meafures are fuch as are known only in imagination, of which there are no real standard, and are used only in computation; as, a £, Cwt, Chaldron, &c. in America.

Courfe of Exchange is the current price of the money of one country in another, and is fometimes more, and fometimes less than its juft value; of this course there are usually tables published daily in commercial cities, (commonly favorable to their citizens.)

Par is the juft rate or course of exchange, found by comparing the money of one country with that of another, eftimating each at its intrinfic value; a which rate the following tables of exchange are principally calculated; but the changeable fituation of the money of feveral countries render it impoffible to afcertain the true par.

To exchange the Coins, Weights and Meafures of one country to other.

those of any

RULE. Multiply the given jum by the proportion which that Coin, Weight or Measure bears to the one which is required, and the product is the answer.

If the number to be reduced be a compound, ufe the proportion between the highest denomination given and the denomination to which it is to be reduced, and proceed as with compound numbers and the fmall denominations of the an

What is the government tunnage of a double-decked veffel, whofe length is 75 ft. 6 in. breadth 23 ft 4?

length 75 6 14 ft (3 of breadth)=61 6 x 23 4 breadth: 1435, x 11 8( br.) 16741 8, 95–176; tuns A.

2

"To take the dimenfions of veffels, by carpenter's measure.

Measure the length by beginning at the aftermoft side of the stern poft, in a line with the rabbet of the garboard streak, and measure by the rabbet continuing this line forward until a‹ fquare from it will meet the fore part of the main stem, immediately under the bowfprit; this gives the extreme length. The width is taken by measuring from outfide to outfide at the main beam, or greatest breadth at the bottom of the black ftreak just above the main wales. The depth of hold is taken from the under fide of the deck at her main hatch-way to the top of the limber plank by the kelfon. The above di-mensions are taken in feet.

To find the tunnage from the above admeasurement:

Deduct of the breadth from the extreme length, then multiply the remainder by the whole breadth, and if a single deck multiply this by her depth of hold; if a double deck, take half the breadth of beam for the depth of the hold and multiply as for a fingle deck."

What is the tunnage of a veffel whofe extreme length is 90 ft, breadth 25 and depth of hold 10?:

EXCHANGE. coffe house

EXCHANGE is the bartering or felling of the money or value of one country for the like value in the coin, weight or meafure of another.

The value of any fubftance is ufually computed in money, familiar to the owner, of which, as of weights and measures, there are two kinds, real and imaginary.

Real money, weights and measures are fuch as are known by fight or their real intrinfic value, gravity or capacity; as, a dollar, pound, gallon, &c. and their real divifions.

Imaginary money, weights and measures are fuch as are known only in imagination, of which there are no real standard, and are used only in computation; as, a £, Cwt, Chaldron, &c. in America.

Courfe of Exchange is the current price of the money of one country in another, and is fometimes more, and fometimes less than its juft value; of this course there are usually tables published daily in commercial cities, (commonly favorable to their citizens.)

Par is the juft rate or course of exchange, found by comparing the money of one country with that of another, eftimating each at its intrinfic value; a which rate the following tables of exchange are principally calculated; but the changeable fituation of the money of feveral countries render it impoffible to afcertain the true par.

To exchange the Coins, Weights and Meafures of one country to thofe of any other.

RULE. Multiply the given jum by the proportion which that Coin, Weight or Measure bears to the one which is required, and the product is the answer.

If the number to be reduced be a compound, ufe the proportion between the highest denomination given and the denomination to which it is to be reduced, and proceed as with compound numbers and the fmall denominations of the an