New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1857-06-10

b, .b..,h;cs srs. with sheets of tin, and

the other BY .hesthng FIRST with sheets OF TN, and
depostrg The copper upon theee chesp ps'ee, either
frSt from the cyanide solution as the suphate cannon
be used for precpating copper upon surface Oh uh
or frst Aim Of zinc upon the tin and then OF copper
upcn this In the theory o. these processes a also III
the operation on the small scale, difficulty oil any
moment suggests itself. To carry out the opera
ton il the large way and actually sheath vessel,
a dock i required into which she can be foated-
and from which the water can be e, out The bottom
Of the shp is then TO be thoroughly cleaned, or OF
wood. vanished ever. The metallic solution i then
10 be let into the dock, and large wire connected
with the negative pole Of the machine, passed around
the vessel above the fluid. From this wire numerous
strips Of metal communicate with the surface to De
coated: while another large wire from the positive
pole terminates at sDy point III the liquid by multi
pyng these wires by using heavy rods the current
from the machine is more rapidly produced, and the
operation will 90 on the expedltiousy Pieces oil
old copper ofany shape size are laid the dock and
they a. they are dissolved keep up the full strength
Of the solution. However impure these may be- nothing
but the pure metal goes upon the vessel The coating
thus of superior quality to the copper sheathIng pre-
pared in any other way. 1t is estimated that vi,h
machine in steady operation for week the whole bot
tom NAV be covered The solution is then TO be drawn
Ell into another dock water let in again, and the YES
sci be Coated out For convenience OF operation two
docks would seem to be required, TO be alternately
used In 50 extensive and novel operation as this,
is rea.onable to look for some difficulties in the first
trails but lone suggest themselves of serious moment
uule.s be the difficulty OF ascertainng the thickness
Of copper deposited on different parts of the vessel
and OF controlling during the process. These, how
ever. are merely mechanical obstacles that will no
doubt Weld 20 the ingenuity Of the inventor OF the ma
chine The cost Il the operation, exclusive of the
docks lot likely to be much more than that Of the
weight of old copper used for the same solution may
continue in use with only slight waste as 1t is trans
efred from one dock l. another. In each transfer II
: freed from the impurities that collect aud settle nit
For coating iron bolts, nails screws, &C., with
correr this process is found to be free from the OBJ
cc,ions that have prevented the gavanc battery
being applied to this purpOse-and these articles are
now thus covered with copper giving to them all the
advantages Of this metal and particularly its freedom
from rust, while they retain the strength and stiffness
Of iron. Bolts and wood-screws are now thus pre-
pared for actual use at the mandatory in Mercer
street. aud it is probable that they will soon be re-
rarled A. il Indispensable articles in all situations ex-
messed to rust. For these purposes we regard the
process patented by Mr. Shepard rs likely TO be of
great importance; and we look with interest to
.he completion ofthe experiment ofsheathng, winch II
it succeed as the Trial upon the small scale encourages
us to expect, j; must work revolution in this expen
sye operation.
company has been organized, we are informed,
undertbe general law Of this State, called the Nag
ne,ic Electric Company" in which is Invested the
patent right of these machines for the United States
Other Companies about to be formed, one to con-
troll their for eectrotypiDg purposes, and another
for sbeatbing while third will possess the right of
the use OF the machine for generating the Electrical
light.