Page:United States Statutes at Large Volume 13.djvu/99

THIR.TY—EIGHTH CONGRESS. Sess. I. Ch. 83. 1864. 71 ion, and also at the upper and lower points of the depth, extending each measurement to the average thickness of that part of the ceiling which is between the points of measurement; number these breadths from above, Transverse (numbering the upper breadth one, and so on down to the lowest breadth;) me multiply the second and fourth by four, and the third by two ; add these products together, and to the sum add the iirst breadth and the last, or fifth; multiply the quantity thus obtained by one third of the common interval between the breadths, and the product shall be deemed the transverse area; but if the midship depth exceed sixteen feet, divide each depth into six equal parts,_instead of ibur, and measure, as before directed, the horizontal breadths at the five points of division, and also at the upper and lower points of the depth; number them from above as before; multiply the second, fourth, and sixth, by tbur, and the third and fifth by two; add these products together, and to the sum add the first breadth and the last, or seventh; multiply the quantities 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 point of division R°8E*°' *°¤· of the length of the vessel, as required above, proceed to ascertain the §§,;Q1,°w mul register tonnage ’of the vessel in the following manner:— Number the areas successively one, two, three, &c., 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 table, into six or sixteen parts, as in classes one and six, or any intermediate number, as in classes two, three, four, and five, multiply the second, and every even-numbered area, by four, and the third and every odd-numbered area (except the first and last) by two; add- these products together, and to the sum add the first and last, if they yield anything ; multiply the quantities thus obtained by one third of the common interval between the areas, and the product will be the cubical 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; *h°'° is the upper decks, on the spar-deck, available for cargo, or stores, or for gu f,°;,e}(:,;ggg$j the berthing or accommodation of passengers or crew, the tonnage of such deck; space shall be ascertained as follows :-—— 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 t0nnage—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, &c. ; 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 first 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 be added to the tonnage under the tonnage-decks, ascertained as aforesaid. If a vessel has a third deck, or spar-deck, the tonnage of the space Wl¤¤¤*h¢P¤i¤ between it and the tonnage-deck shall be ascertained as follows : —- °‘ umd d°°k' Measure in feet the inside length of the space, at the middle of its height, from the plank at the side 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