The Sun.
London, England, 1810-05-01 00:00:00

.EPIC ItA.`-',I, . .
...
sigAressed to the Knights Companion of oie Clrrer on twist
ing ail the Insignia of their. order,. decorated with a protu.
of Diamonds, at the jateynagnificent Dinner.

•
The trappings of those Carter'd Knights,
Whom Cambria's Prince in State invites,
A heavy business would be
To a tight-hearted Host like tjrie;
- For, rather than on dullness border;
Since the Companicurs I 'd admit,
Should chew their brilliancy in 'wit,
.OTC CoPze I'd-sacrifice all Ohicr Irarripstead Heath, April 28, 1810.

E. C.

ROYAL ACADEMY.

Og 1VAA.7.47,G, OF CaßracE,

AUGUST 1741.

- - -
White or untarred. Broke with 4500 lbs. Tarred.'
--------- 3400 lbs. 4 3300
41805t900 --------- 3250

APRIL 25, 1743.

4600 lbs. -----,—, -3100
coot.

34C0

SETTEMBER 3, 1743.

3800 lbs. 3,00 lbs.
4030 2100
4 ZOO •-•-•••••• --••••••••.---• safoo
A parcel of white and tarred cordage were taken
out of store, of a quantity vvbie.ll had been made,
February • 12, 1,746,. and comparisons were made
from time to time, as followS
'I he White Rope bore. The Tarred Rope bore. Difference
1740. April 14 —2645 lbs. ---- .23 I• 2 lbs.
1141, May 18 —2762 lbs. ---- 255 333 lbs.
607 lbs.
1747,
Oct. 21 —.--2710 lbs. aoso lbs. ---66 n lbs.
748, lune 19 —2575 16s. --- 1752 lbs.
d ----- 888 lbs.
1748, O. 2 tbs. ----- 183 lbs. ---- 588 lbs.
1749, Sept.as 2917 lbs. --- 1865 line —7-rose lbs.
Some experiments were made in England on cord-
age Of size. A piece of rope 3' 1-5 inches circum-
ference was cut Into many portions : each of these
had a fathom cut off, add it was carefully opened
out : .it was white or untarred, and contained 72.
yarns ; they were each tried separately, and thyir
mean strength was go lbs. Each corresponding
pieCe of rope was tried aparr, and the mean strength-
.of nine pieces was 4551 lbs. ; but tf.titnes 72
0480. This proses a a,, age, composed of separate
yarns, is sm.) tgzr than a ro,.e of the same number
of yarns;, oei.a,,s,; the y,rns in ihis rope did not all
n,--ar the saute strain: Formerly all the yarns of a
rope w-tre the same length, and therfore the
inner yarns were slack, and did not bear the
same s rain as the outer. An intelligent Scotch-
man,. who resided in Denmark, obseiving this
faith, proposed a new method of making cord-
age, and which has been adopted. In -twisting
the strand, intakes of itself .as much of each *yarn
which compose the rope as is w,:nted, and ther'efore
all the yarns bear an equal strain as in a salvage ;
and therefore the ropes are now stronger than here-
tofore. A question may here.be, asked, whether an
experiment has been made between a rope made on
the new plan and a salvage, of the same number of
yarns ? becauSe, it appears probable, they will
bear the same weight. If no experitledt has. been
tried, and an :hypotheSis established, " that because
'a
salvage was stronger than the rope in the way it
was formerly made, it must be so now, although
the rope is. made differently," such reasoning is fal-
lacious. The cables that are at present made in the
navy are twisted slack, and they must open and rub
by taking the groutid.. At first sight it appears.a
short way;Of making long swabs. Perhaps nonlore
slack twisted Cables will be made, . if. the following
experiments are tried with ropes of the same size.
A rope tarred made in the old manner. .A rope
tarred made in the new method. A white rope
ditto. Apart of this rope first stove& and then
tarred: A salvage white. A salvage tarred in the
yarns

The following will express the tons a rope will
carry :=-I.Vlultiply the circumference In inches by
itself, .and take one-fifth part of the Trodua.—
Thus, if a rope hare six inches in circumference,
six times six is thirty-six, the fifth part of which is
seven and one,fifth tons. This seppOses the rope
rather too. strong, but the rule may be,of use.

• The inner yarn is ,one.third shorter than the. outer—
what a prodigious inequality in length •

AGRICULTURAL REPORT FUR APRIL,

' 1 . The.i,rineiple On. which all ropes are made; is to
. I give each yarn an additional t Wigs,' so that, bY mi-
-1 twisting, they assist in laying the strand a contrary
I way; for instance, take two pieces of whipcord,
give each an additional twist, after qing them to-
gether, and pinch the untied ends • together, then
t let them go, and they will twist a strand of• them=
selves the contrary lay. The tarring the yarns, there-
fore, before the rope is made, destroys that- power
of untwisting, and violates the principle on which
all cordage is made, and appears one of the causes
why a white or untarred rope is stronger than t
tarred rope. For this_ reason, the ' Dutch, in the
dock-yard of Anasterda:::‘, spun the yarns and made
the rope white;- after which it was put iu:o a stow-. room to dry for 24 hours; because if the hemp was
danip, the tar would not adhere to it. -E amine a '
rope where the yarns are tarred, and you will find
the tar in lUmps, and not equally diStributed, and
which is owing to the yarns being more damp in one
part than another.- After the process of-storing, Go. •
tons of rope at a time are lowered on gratis gi into
boiling tar, and left for one hour,' then taken ow,
when every rope is complely saturated with tar, and
in two hours time will hardly soil a white handker-
chief. The following experiments were made by
Monsieur Du 'Hamel, at Rochefort, on cordage three -
inches (French) in circumference mane of thebest
Riga. hemp :—. , „