Page:United States Statutes at Large Volume 18 Part 1.djvu/872

 800 rms xLvm.—coMM1·:Rc1·; Asn 1vAv1oAr1os.-cn. 1. uantities thus obtained by one-third of the common interval between the breadths, and the product shall be deemed the transverse area. Having thus ascertained the transverse area at each dpoint of diyision of the length of the vessel, as recmired above, procee to ascerta1n the register tonnage of the vessel in the following manner: Number the areas successively one, two, t ree, and so forth, number one being at the extreme limit of the length at the bow, and the last number at the extreme limit of the length at the stern; then, whether the length be divided according to the table into six or sixteen parts, as in classes one and six, or any intermediate number, as in classes two, three, four, and live, multiply the second, and every evenmumbered area by four, and the third, and eveiéy odd-numbered area, except the first and last, by two; add these pro ucts together, and to the sum add_ the first and last if they yield anything; multiply the quantities thus obtained bv one—third of the common interval between the areas, and the product will be the eubical contents of the space under the tonnage-deck; divide this product by one hundred, and the quotient, being the tonnage under the tonnage-deck, shall be deemed to be the register tonnage of the vessel, subject to the additions hereinafter mentioned. If there be a break, a poop, or any other permanent closed-in space on the upper decks., or the spar-deck, available or cargo. or stores, or for the berthing or accommodation of lpassengers or crew, the tonnage of such space shall be ascertained as fol ows: Measure the internal mean length of such space in feet, and divide it into an even number of equal parts of which the distance asunder shall be most nearly equal to those into which the length of the tonnage-deck has been divided; measure at the middle of its height the inside breadths, namely, one at each end and at each of the points of division, numbering them successively one, two, three, and so forth; then to the sum of the end breadths add four times the sum of the even—numbered breadths and twice the sum of the odd—numbered breadths, except the iirst and last. and multiply the whole sum by one-third of the common interval between the breadths; the product will give the mean horizontal area of such space; then measure the mean height between the planks of the decks, and multiply by it the mean horizontal area; divide the product by one hundred, and the quotient shall be deemed to be the tonnage of such space, and shall he added to the tonnage under the tonnage-decks, ascertained as aforesaid. If a vessel hasn third deck, or s r-deck. the tonna e of the space between it and the tonnage-deck shallube ascertained as gvllowsz Measure in feet the inside len th of the space. at the middle of its height, from the plank at the smc of the stem to the plank on the timbers at the stern, and divide the length into the same number of equal parts into which the length of the tonnage—deck is divided: measure. also at the middle of its height, the inside breadth of the space at each of the points of division, also the breadth of the stem and the breadth at the stern; number them successively one, two. three, and so forth. commencing at the stem; multiply the second, and all other even—numbered breadths, by four, and the third, and all the other odd-numbered breadths, except the first and last, by two; to the sum of these products add the first and last breadths, muitipl the whole sum by one·third of the common interval between the breadths, and the result will give, in superficial feet, the mean horizontal area of such space; measure the mean height between the lank of the two decks, and multiplv by it the mean horizontal area, and) the product will be the cubical contents of the space; divide this product by one hundred, and the quotient shall be deemed to be the tonnage of such space, and shall be added to the other tonnage of the vessel, ascertained as above directed. And if the vessel has more than three decks, the tonnage of each space between decks, above the tonnage—deck, shall be severally ascertained in the manner above described, and shall be added to the tonnage of the vessel, ascertained as above directed. In ascertaining the tonnage of open vessels the upper edge of the