, 1865-01-24

may be family discerned, though they form a
substantial and practical homogeneous coat
ing. about a sixth Of an inch thick. In
the section we shall further perceive that the
core is surrounded by a close mass, more than q
quarter of an inch thick, in which are ten round
spots of metal; in other words, the sectional
ends Of ten iron wires. In fact, the protecting
mass will be found TO consist of ten closely
twisted strands of the soaked Manila yarn,
each strand having iron wire in the middle. 1t
is at the separate factory, some hundreds OF yards
from the closing and coiliug machinery at Nor
den Wharf, that this covering is Manufactured,
so tons of the iron wire being used every week
in combination with Manila yarn at the rate of
81 tons O. day. The wire is received in COTS
from Birmingham, and, having been oiled, Is
stored until wanted then it Is joined very care
fully by scarfed ends, or ends cut transversely
and fitted together. The machinery by which
the Manila yarn is twisted round the Wire Is
yerv ingenious, each machine being a long hori-
xontal shaft or spindle, with alternate discs of
perforated iron and bobbins of the gold-coloured
warn. In one set Of machines the axis of the
bobbins is PARALLEL to or indentical with The
spindle, and the revolution is the same IN rapl-
dity as the fixed iron discs; but in an improved
series of mechanism above stairs this arrange
ment is altered, the bobbius being set transverse
" with the shaft, and revolving very much
more slowly. 1t is, indeed, q curious and "a
ther perplexiug sight to observe the difference
in the two motions, the discs whirliug so rapid
" as to render almost invisible the threads OF
warn passed eccentricaily through the holes
while each thread unwinds itself in the coolest
and most leisurely way from the bobbin. These
machines will each turn out lao miles of Manila
covered wire in a day. AS it Is twisted 1t goes
through the hot solution above mentioned, and
is then passed through a trough OF water to cool
it.. These little details must be noted by the
visitor by use Of his own eyes for during the
time of his being inside this factory his power of
Distinguishing the sounds of the human voice,
even if conveyed in q shout, is in allegiance,
At the Morden Wharf factory another stage OF
operations il commenced. Here the core ls re-
ceived on large reels, and IS sunk IN circular
openings, which are then filled up with water.
From FIRST 10 last the cable is in all its process
ses Of formation at this factory kept 10 water,
that any haw in the coating may the more
quickly be made apparent. For twelve hours
the coils of core are subjected to electrical tests,
their continuity being ascertained and their
complete insulation proved beyond a doubt
Malicious injury to the core, in ls transit from
the Outta.percba works to Morden Wharf,
would thus be defeated in its purpose by prompt
detection and remedy. The joining of the ends
10 about the most delicate operation in the whole
course Of manufacturing the Atlantic or any
Aelepraphic cable and whenever the electrician
nroclaims q faulty transmission of the current,
The chances are a hundred to one that the flaw
will be found in one Of the joints. Before being
worked into cable with the ten strands OF wire
and yarn, the core is wrapped in a twisted fold
Of jute. which may be just distinguishable
in one of those sections that we have
already alluded 10. The machinery by which
tho cable is twined occupies two floors. The
closing machines are below, and they consist Of
large wheels or tables, revolving horizontally,
with reels of the several strands SO arranged on
their margin as to maintain a relatively station
ary position, instead of always keeping their
axes pointed to the centre Of motion The
strands, conveying upward towards a small
oneuine in the root, meet, and are twisted round
the inte covered core, and so form the entire
cable, which is conducted over grooved wheels
TO another and very noteworthy department..
A visit to q large brewery is recalled by the
appearance of this place. where platforms lead
between huge tanks, or what would elsewhere
be watts. They are eight 10 number. four being
round and four oval. The round tanks are "a
feet in diameter, aud the oval ones measure Sc
feet BY 81. Their depth is ~ feet. and they
are intended as receptacles for the cable, which