New-York daily tribune., 1856-04-25

-. of vessel II IL capaole Of oe,ng 's' up
tbe NeoN" ~, "a ubicb are far superior 70 Tue uea1-
~ ".S Isrvs;ds now empi0yeui " o. - . -,
.yessS,s snd tbe chaius a'e eA'eN-S -, I. -
s gees rrsr complete bsbtomg aan !. b1tflc when
led IN every side OF the mp and extremely iuicy in
the tar contaDeu ;,ber of which evils exist TO the
avery 20 . ~ TIE wire rope ngelng' a..IOusu pau
same eA.;",es TAR il employed on tuc iSv = 90 "u
s;,;ops projection from ,De eo, Se,irabe QUALITY n
whether ssHs;yed different solutions from eminent
Tlgghg ns;.,ced nsyiyators; but recent cafeiu ex-
ehd sd ,bogn that the diiererce in this respect
Ight 10 be Of praccaoie lpPoi.euce IA e'ner
was 'oo The wire tss undoubtedly the advantage
view "tno,,snt WI p,operty Os maintaining uniform
tn I'd. e. Given tension, without any o. the sud
lepgu .ss,;ons in this iespect exhibited by hemp
cen SsSnuspty produces disastrous results In single
night. ,...sor which cnsued. IT appeared that the
IN w 1Iean. employed for protecting the extended
o'u<D5 <"e5 was simple coating Of Spanish brown aud
spJ I'll spOlied thoroughly 10 each wre In the pro-
hle''f e ,s manufacture. The toughness of wire was
med 70 depend much on the quality OF the ron aud
hsS .lso % the frequency Of tse annealrg pro-
NUT nuena,nnioyed in drawing II down. Mr. Back u.s. the
e.ran esss gave the MessTs. Washbum Of Worcester
Us cedi, Of having made wire on large contract
II. III shieb he wGs connected the test of which, by
ruat.top. VIZ was that it should wind tightly around
s-p,bs, glre of the same diameter without exhibiting
90 s rouohness when examined by the microscope.
c ron employed in this contract was American iron,
"a tbs result proved considerably stronger than that
zen by tie English tables with which they were
M WALLACE explained the processes employed in
IN sp the wire at the Roeblng Works in New.Jer
"le TIE rope-wak is 900 feet in length and the
,s.tet care s taken to insure perfectly equal strain
o. sverv strand and on every individual wire. The
rnt of twist and the fincnees of the wire cnplOyed
S."nded on the uses for which the rope intended.
S,i,;orsry rope was sometimes made from wire a.
80 ~ number s. while tiler ropas Ia very impor-
,.1 spplcatiOn by the way, il case Of FIRE wert
r,de from fine wires put gether with considerable
twist. 49,
NJ, THOMAS ID. STETsoN believed that the Wash
baTr, employed large quantities Of Swedish and Nor
syan non 10 the manufacture of their wire, though
49, mioht be able to manufacture very superior
sSfle from some American varieties, and perhaps
n,sr ed il for extreme tOughness in the cited
r. M Baokus He explained the process employed
N ayipQ the cables Of the Niagara Suspension B,dge,
scb are not twisted, but formed Of wires stretched
;,5en4pdetly across and then bound together
op,ge wire was first adjusted in precisely the right
wss ad until it conespoDded exactly. This plan
sSaed parity for its superior strength, and partly TO
ayoothe difficulty OF lifting such heavy cables to their
pisces
and instructive and there is not place where parties
ipterested in mechanical progress can spend an even
ipg more proftably or pleasantly. The meetings
held on the second and fouth Wednesday evenings in
each month. The discussion Of the next meeting will
relate 10 the Steam Engine.