New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1856-10-07

both the applying an rerooNins-ss aho V nm,
STAYING in its place anti the hoIs bscorp.s No..
siderably too large-the smaller heed aid al, -
shank which conpec,s il xah the other !, yOk. :.
four parts which spring slightly b. their elAst,,i,v
that it contracts on entering or leaving The ho,r. -
extends to its full size when fairly in place. bvo.n
seem very desirable improvement Tor shlr-bc.r,
a, il would dispense with much Of the crumpxne A.
soling now unavoidable in h,ing the ordinary spa
AIUxrSrun-The new metal, the bass Of CONN.,.
cIay j. now sold in London for e. per ounce h-..
nearly as dear as gold by weight but an iraneas~,
larger quantity goes for an oGnce, IN eooseqseoce
its small specific gravity. NJ Saint Claire Devil d.
inventor Of the process for extracting II, at rs.,
meeting of the ROYAL Institution, exhibited bean .
q vory delicate balance, made OF this material n
which purpose its extreme ghtne~s makes i, PccalAs,
spplcalle. Ii is very ductile strong and -ouorr-.
and has been used for strings FOR pano-fortos buL
did Lot affirm il to exhibit any very marked ,upers,s.
over The ordinary wires. Its hshtDess and abltvs
resist corroson has been taken advantas. Oh with a..
cess by the surgeon and dentist bu, al,or.,se, a.
metal docs not seem to be making any very r,,I
strides toward an extensive introduction.
PIowfs6 BY STsAN-At the recent Annual Rim,
ton of the Royal Agricultural Society in EnSiA.a
field locomotive (Mr. Boydel's) dragged sevea rbv,
connected together in one frame with eonsiiersh,
ease and speed over quite undulatsng ground n
boiler engine, wheels, etc, in shor, the vhA
locomotive, inclading endless railway on whsh
runs to give il broad, firm bearing on the earl
weighs nine tuns; and with steam at sixty poc.S,
(about the usual pressure, by the way, on Easkss
locomotives instead of ITO, as with us) woshs N \
twelve horse power. The fuel used was coal Tv.
other exhibitors also nvslcd each other in dpvn.
plows by stationary engines, employing finch WIN
ropes for the purpose Anchors have to be placed 4.
the opposite side OF the field from the engine, aad u.
plows were drawn back light by means Of psR.u
One used for anchors simply heavily-loaded wsec,,
with sharp.rimmed wheels which cut into the roma
70 az to offer great resistance to being dragged sdsv
while they were easily moved leDgthwise sSas The
side Of the field as the blowing progressed.
TvRPENrISE.-There are several hundred xas tos
the manufacture of spirits of turpentne in the State
North Carolina alone, while the States bordering %
the Mississippi are all more or less engaged lit. ns
uses Of resin and turpentine seem TO increase VII
every development of inventive talent. ln painting
printing in soap making. and especially IN lighting b
use seems TO be almost universal II forms an impg.
tan. element in many chemical operations, and 10
estimated in a late communication TO the London n
;v If Arts that from two TO three hundred thoussl
dollars worth IL consumed annually in the Amercr
Indis.rubber manufactures. From b,Vo 70 Nv
tuns have been imported into England annually b
many wears past, aud almost exclusively from b.
United States.
AWoop BEARINGS FOR SHATrs.-The Englisa hN
tuition Of Mechanical Engineers have been dscusias
the value ofwood bearings developing facts far mour
nrsine than those we have before presented UadGtx
extraordinary pressure of 600 n. per square inch nj
with the surfaces rubbing together with -peed fM
(eet per minute, an experiment Of three houp dursa
nroduced not the least sensible abrasion. The ux
pressure allowed on bearings varies from sbost d
to 200 n. per square nch-the best reeulta 40 hrs
friction is concerned being found with about "
per inch on metallic bearings we'll oiled. In these n.
periments no oil was used but the bearings were s
covered with water. Wood bearings seem only si<
dent where they can be kept wet; several trisk ,
other situations having proved In no wise sapS
ior 10 brass. and in some cases the WOOD had
charred The absolute quantity Of heat generated
greatest with brass besrngs in the proporton Of
10 10 L. hut the non-conductng nature OF voSd, "
combining and accommodating the small quantities sens
sted induced trouble, unless large stream 00s
of alter or oil was applied.
The screws steamer hdaccs and HmaIays ves
using wood bearings for screw shafts with great n
cess. The wood was prepared in narrow strips ~
sprlied a. Kind Of lining to the ordinary brass os
ines. The friction in this situation is at night sacr
to the grain of the WOOD and it is to be observed
the experiments appear to have been all made W
brass, and none with iron journals. The iron shss
employed for general purposes might act diiisr's
In the Himalaya the shaft is IS inches in diamex
and the bearing in the dead wood at the stem ai~
long. 30 that the weight of the screw and 'hafs
duced load OF less than 20 h. per square Dsa
while stream of water is allowed to tricke besv~
each of the strips and flow into the vessel whsosi
is pumped by the engine. No wearing could be D.
covered after running 90 900 miles.