forenoon, although accompanied by a considerable swell, induced Captain
Stanley to make a third attempt to obtain deep-sea soundings. He had been
much interested in the success of experiments of this kind, in which the
grand desideratum has always been to produce POSITIVE PROOF OF HAVING
REACHED BOTTOM by bringing up a portion of its substance, hitherto
unattempted on account of the great length of time required for the
experiment, and the disproportionate strength of the line to the enormous
weight employed, should any sudden jerk ensue from the heave of the sea.
Captain Stanley had at length succeeded in contriving a very ingenious
apparatus by which, upon striking soundings, the eight 32 pounds shot
employed would be immediately detached, leaving no greater weight to be
hauled up than the iron framework to which the shot was slung, and a
small bell-lead with the usual arming of tallow, to which portions of the
bottom would adhere. The line was similar to that employed on January
12th, as then carefully coiled away in casks, each of which held from 800
to 1000 fathoms, and ran out remarkably well, without any tendency to
kink or get foul; but, unfortunately, after 3500 fathoms (or forty yards
less than four statute miles) had gone out, the line parted, from some
flaw, it is supposed, as a piece of the same bore a far heavier weight
when tested subsequently on board. The whole weight employed was equal to
280 pounds; and the time taken by the line to run out was 1 hour, 59
minutes, and 56 seconds.

COLUMN 1: FATHOM MARK.
COLUMN 2: TIME OF PASSING (IN HOURS MINUTES AND SECONDS).

100 : 0 0 42.
200 : 0 1 49.
300 : 0 3 3.
400 : 0 4 23.