70 THIRTY-EIGHTH CONGRESS. Sess. I. Ch. 83. 1864. shall express ber length and breadth, together with her depth and the height under the third or spar deck, which shall be ascertained in the 'I`<>¤¤¤8¤~d¢><=l¤· following manner: The tonnage-deck, in vessels having three or more decks to the hull, shall be the second deck from below; in all other cases Vessel’s length, the upper deck of the hull is to be the tonnage-deck. The length from the forepart of the outer planking, on the side of the stem, to the afterpart of the main sternpost of screw steamers, and to the afterpart of the rudderpost of all other vessels measured on the top of the tonnage-deck, shall be breadth of accounted the vessel’s length. The breadth of the broadest part on the b°““‘· outside of the vessel shall be accounted the vessel’s breadth of beam. A measure from the under side of tonnage-deck plank, amidships, to the ‘l°P"‘ °H‘°m’ ceiling of the hold (average thickness) shall be accounted the depth of _ hold. If the vessel has a third deck, then the height from the top of the S £ff§;fk“"d°r tonnage-deck plank to the under side of the upper-deck plank shall be ae- P l counted as the height under the spar-deck. All measurement to be taken ,,,]$,°§§§;:g`:,:¤’ in feet and fractions of feet; and all fractions of feet shall be expressed in and how ex- decimals. P"°”“{l‘ Sec. 3. And be it further enacted, That the register tonnage of a vesu,g§gg?`et°"` sel shall be her entire internal cubical capacity in tons of one hundred whafand how cubic feet each, to be ascertained as follows: Measure the length of the ¤°°°'*°l”°d· vessel in a straight line along the upper side of the tonnage-deck, from the inside of the inner plank (average thickness,) at the side of the stem to the inside of the plank on the stern timbers, (average thickness,) deducting from this length what is due to the rake of the bow in the thickness of the deck, and what is due to the rake of the stern-timber in the thickness of the deck, and also what is due to the rake of the stern·timber in one third of the round of the beam ; divide the length so taken into the number of equal parts required by the following table, according to the class in such table to whieh.the vessel belongs :— Table ofclasses TABLE OF CLASSES. of glfslasty Class 1.-Vessels of which the tonnage length according to the above measurement is fifty feet or under, into six equal parts. second, Class 2. — Vessels of which the tonnage length according to the above measurement is above fifty feet, and not exceeding one hundred feet long, into eight equal parts. third, Class 3.-—Vessels of which the tonnage length according to the above measurement is above one hundred feet long, and not exceeding one hundred and fifty feet long, into ten equal parts. fourth, Class 4.-—— Vessels of which the tonnage length according to the above measurement is above one hundred and fifty feet, and not exceeding two hundred feet long, into twelve equal parts. ufth, Class 5. —- Vessels of which the tonnage length according to the above measurement is above two hundred feet, and not exceeding two hundred and fifty feet long, into fourteen equal parts. Sixth Class 6. —- Vessels of which the tonnage length according to the above measurement is above two hundred and fifty feet long, into sixteen equal parts. nwargpiggssl Then, the hold being sufficiently cleared to admit of the required how asccrmngg depths and breadths being properly taken, find the transverse area of such vessel at each point of division of the length as follows:-- Measure the depth at each' point of division from a point at a distance of one third of the round of the beam below such deck, or, in case of a break, below a linestretched in continuation thereof, to.the upper side of the door-timber, at the inside of the limber-strake, after deducting the average thickness of the_eeiling, which is between the bilge-planks and limber-strake ; then, if the depth at the midship division of the length do not exceed sixteen feet, divide each depth into four equal parts; then measure the inside horizontal breadth, at each of the three points of divis-
