Huntsville gazette., 1882-06-03
SCIENCE AND INDUSTRY.

Brass castings shrink one-eighth sseAref.
Inch to the foot in cooling 80 ~ "a, A---,g.
"A process by which silk threads,
shreds and pieces of all kinds can be aaaa ~
dissolved and coated upon cotton, 3. tesast Z.
woolen or other fabric so. that it will .4. .a.
wear the outward appearance OF genuine
silk, is announced. s53N Ea a5TN ~ Tsa5Eihsaat ta-
sa-A great number of analyses and ex- :, x.ygs.s
periments, conducted by Mr.,A. Levy. l M.
show that grapes ripened in sunlight S
contain 359 per cent 9nlore sugar AandPg tA -.
1s247 less acids than those matured in ss,..,s,.
darkness. .YgA~Ho.5 u1rara ID N
In order tosmake a. good printing
ink, which viii not give forth disas
greeable SMELL, DR.. Brackenbush, OF o.
Berlin, dissoves 45 parts of fine resin in
25 parts of parafline oil by heating them 80
to so deg, or by incorporating them a.4.
mechanically at the ordinary tempera- .a-... .
ture, and when this latter operation is u
completed 10 parts Of lampblack ara ,l,,f
added. t I+al"
Whether American salt meat can ta eai
convey trichin@ was question lately
discussed in paper bys NJ MaColn and rtED
read before the French Academy OF !.
Sciences The conclusion arrived at was ''
that the meat in question, as now i'm
ported into Europe, might in very rare s.l..J
cases transact trichinoss when the ami
NAL was but recently killed, the pieces
Of meat large, and the process of cur
ing imperfectly conducted vsena,rsy r.a..f
The practice is common among the
engraYerS and swatchmakerS of Ger
many of hardening their tools in sealing
wax. The tool is heated to whiteness@ saa f.
and plunged into the wax, Withdrawn .u
after an instant and plunged again, the
process being repeated until the steel is u-
too cold to enter the wax. The advan- ~.
tages claimed for this method are that Af
the steel becomes almost as hard as ,rH 5 -
diamond, and, when touched with & lit
tie oil or turpentine, the tools are supe- sAAi
rlor for engraving and also for piercing
the hardest metals.--DenUer Tribune. ssaa r -
Prof. Barff, an English chemist ,yil..t ...iv
has discovered solution of boracic NM
acid which he claims viii preserve ht III
sight expense all perishablesarticles of i4s s
food: He has preserved pigeons, turtle,
Jamaica fruits, sardines, Holsters, her. M" !,
ring, fowls, pheasants, tongue, oysters,
beef and mutton, for periods of several ..7Hl. H.
weeks and several months, in. none Of
which, either to the. taste or smell, was -"
there the slightest evidences Of d6con1po- .- -.-4
stion. This is timely discovery, for .ss-....
meats well as game are pretty
'shigh'' just now.
y *--Electricity is now used in porcelain
factories to obtain perfectly white M III
paste. The pastes, in aliqud state,i are .-
run before very powerful. electro-mag- l.
nets driven by Gramme machine. 4"
The poles of the two electro magnets IN. y,
are placed opposite each other, and be-
tween each of these magnetic groups is
kind of funnel the poles Of which act
on the moldin which the iqud' runs Hars Sai4t:
Twice q day the surface is cleaned OF -4 ,g Y.
the ferruginous particles that adhere to
lit. Upward of zoos pounds of paste A-l4s, zsA
can be purified daily by this process, -.. "a. Nv,
which gives the manufactures an ad- IVY.
'ditional value of forty per cent.