Year: 1864

4
breadth and the last, or fifth multi
ply 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 four, and measure, as be-
fore directed, the horizontal breadths
at the five points of division, aud also
at the upper and lower points of the
depth number them from above as
before multiply the second, fourth,
and sixth, by four, and the third and
! fifth by two add these products to-
getAer, and to the sum add the first
breadth and the last, or seventh null.
tiply the quantities thus obtained by
one,third of the common inte val be-
tween the breadths, and the product
shall be deemed the transverse area.


Having thus ascertained the trans
verse area at each point of division
OF the vessel, as required above, pro-
ceed to ascertain the 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 ex-
treme 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 null
tlply the quantities thus obtained by
one-thlrd OF the common interval be-
tween 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 quo
tient, being the tonnage under the tom
mage deck, shall be deemed to be the
register tonnage Of the vessel, sub
ject to the additions hereinafter mem
toned.


If there be break, poop. or any
other permanent. closed in space on
the upper decks, on the spar deck,
available for cargo, or stores, or for tho
berthing or accommodation Of passen-
gers Or crew. the tonnage Of such
space shall be ascertaincd 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 bo
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, name.
~, 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 num-
bered 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 inter-
val between the breadths the pro-
duct will give the mean horizontal area
OF such space then measure the mean
height between the plank of the decks,
and multiply by it the mean horizon.
tai area divide the product 10y ono
hundred, and the quoticnt shall be
deemed to be the tonnage of such
space, and shall be added to the tom
mage under the tonnage decks, asccr-
tanned as aforesaid. '.....
1t vessel has a third deck, or spar
deck, the tonnage Of the space between
1T and the tonnage deck shall be as
certaincd as follows: ..


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 the mid
die of its height the inside breadth
OF the space at each of the points of
division, also the breadth Of the stem
aud the breadth at the stern number
them successfully one, two, three, and
SO forth, commencing at the stem !;
multiply the second, and all other even
numbered brcadths by four, and the
third, and all the other odd-numbered
breadths Except the first and lastl by
two to the sum of these products
add the first and last breadths, multi.
ply the whole sum by one. third of the
common interval between the breadtbs,
and the result will give. in superficial
feet, the mean horizontal area of such
space measure the mean height be.
tween the plank of the two decks, and
multiply by it the mean horizontal
area, and the product will be the cubi-
cal contents Of the space divide this
product by one hundred, and the quo.
tient shall be deemed to be the tom
mage Of such space, and shall be added
to the other tonnage of the vessel, as
certaincd as aforesaid. And if tho
vessel has more than three decks. the
tonnage Of each space between decks,
above the tonnage deck, shall be sew
orally ascertained in the manner above
described, and shall be added to the
tonnage of the vessel, ascertaincd as
aforesaid.


In ascertaining the tonnage Of open
vessels the upper edge Of the upper
strake is to form the boundary linc Of
measurement, and the depth shall be
taken from ali athwartship line, ex-
tending from upper edge Of said strake
at each division Of the length.


The register of the vessel shall ex-
press the number Of decks, the ton
mage under the tonnage deck. that of
the between decks, above the tonnage
deck also that of the poop or other
enclosed spaces above the deck, each
separately. In every registered Uni
ted States ship or vessel the number
denoting the total registered tonnage
shall be deeply carved or otherwise
i. permanently marked on her main
, beam. and shall be SO continued; and