The sun. [volume] (New York [N.Y.]) 1833-1916, 1891-08-09


Several Of the most prominent manufacturers
Of iron in Bheffleld. Eng. have been endsavor-
Ing to ascertain definitely whether. after all.
oil hardening and AnnealipR. or some such
result Of the trials thus far made showing that
IN respect to comp1und armor: the necessity
es and % c .To
plates each four feet square one riec: being
Sb ss es Shs5 all 5, nsS
gun with Firth steel projeoiles weighing 100
Ss n The b ,s u snI
s:s s.G ss sE hi VI r. Fl . Ss4
and one. hall inches. 90 that isht wa. Just Wis.
ible through the centre Of the bulge at thu haek
Ing into three pisSes. and the plate. though
cracked through. was whole. nor was any ma
In III. case q the created plats. the shot
passed through. and the splintering OF me
spread over a spase Of fifteen inches across:
The splintering around the hoe at the back ri
sSe ps M
French ingenuity has contrived a remedy for
tho insfficiency OF ordinary combination locks
for houses and apartments. these oontrivancss
being usually OF so little avail against profess
sionas who. wasting no time in efforts to raise
ths tumbsrs and move the bolt Imply Insert s
whole affair inward. tearing ont both locks and
bolts on the way: Ar e. to the nsw device
r.. crdin ~. Lock in such : M name!
which will resist an enormous sua,n. but on
&: return q the rrpnrstGST the unockqs o"
@ no '" ob.t%e e to The crenins q tho
not be very elaborate, although the picking OF
tue lock would move both the bolt and the
vent picking with bit OF wire. and il the i'm:
my 70 insufficient for the purpose tho point OF
Manufactu, ers OF corks are directing their
attention to the production. II possible. OF q
cork that shall be impenetrnble when used for
wine bottles. to the various type. OF worms
which nfest tho latter. This ia true In o.
Of which feed on tho 'unsoid growth tina!
boring and forming galleries in the cork near
! est TO the glass. and through the holes thus
| Ing It. Various me, hobs nave 6een .resoriei
to o overtome the d tilcnlty. ono OF these b.
snd are Dus
| tho bottles coat tho tons with layer OF paraf-
anaTy wos snsn coatss Sene
prevent my entrance into the cork itself OF
grubs or insects.
| In silvering iron 4 recent orecess introduced
In Austrian workshops consists In plunRIng
the iron article into hot dilute hydrochloric
| acid whence 1t Is removed to q solution OF
polls Of Bunssn sl-ment. gas carbon or niati.
mum serving az the other role; It IL rapidly
win and n'sss
/ s sd,ISye bath AN anu silye!ed. By heatine e
The silver firmly ixed on the IRON i" save
| silver the wire may DO first covered with
q iii III sss; sr S Fl BEING
one or moro tin anodas joined with the carbon
81 rnc
and the battery made to act unit. enough tin
s emo ae tbs IN: IN ts Is
| Tho wire thus treated is much cheaper tnan
An improved kind OF soap for metal work
has lately boon described. Of some special adj
vautaRes. 1t is said. as compared with those
usually employed IN this Ilne.that is. mix;
With q small Haantits Of r"ueeNa r whieh.
when freshly Prepare leave nothing to be
htfor use The new g. ticl. IN now brought forward
sds 20 yss hs n -. nnS .
manner: % kilos. Of the butter are melted In
aud the same Of creAm Of tartar and II white
SLOWED e .oIidlliy Fhis soar mis- IS made into
| TO be cleaned. and finally removed by dry rag
or channels leather.
| From number OF careful tests lately made
70 ascertain tho precise strength OF anchor
bolts set in Portland cement In the ordinary
way. the fact appenred tina, the Joint was really
tion. two-inch iron rods Were set into tho
stone m. eleven md on nh inches. sni
mont, and tho cement BEGAN 10 Yield a a load
ssns snss a 20 n s stsRs
smoo rod, it was found TINT tho cement BE-
rock broke at $40 % pounds. Thus. though
the s,rsoEth a OF he cement Iolnt was not de-
ting the cement loini on smooth rod might
bs made to break tho rod.
Bone Of tho English manufacturers OF tex-
tiles are Introducing finishing method. BY the
i use Of which. 1t IA asserted. the materials be-
como OF considerably greater strength. acaaire
o greater capacity tor containing or absorbing
natural moisture. have more regular as we'll
a. close and glossy appearance. take ur dyes
economically. and win dye richer ana faster
shades. The materials; whether In cops. hanks.
solution Of sodium hydrnts which change. or
| modifes the celluose by com bi ning with It.
ausnly elminsted BY wsshinr: 1 his IL done
alter the materiale have ne-n removed from The
can be 10 t By thor
ouRhly impregn atinv or rinsing the material
With warm water. this being shnwered upon IL
| though using as little ~ possible. The water
deo9mposes or dissipstes the soda cel9lnse
| OF soda taken up ny the nbre. bnt at tho Same
time without CLEANSING back the miro to Its
when seen Under the microsrope The native
fia,tened spiral rellulose cell has become .
The sodium hydrate elm mated can be rsgsn.
Grated; and the solution Is concentrated by q
multiple effect eyaporator. then returned to
the bath. and be available Tor future use.
A short time ago. tho French Governm mont
caused to be instituted a series OF tests Of gun
steel at q low temperature. that 10 from rs 10
1907 below zero Fair. mart ri tho bar. being
hardened and part unhardened, and the break
Ing load was Increased by the cooling,3 per
and 8 per cent In tho case Of the
hardened ones. 1t seams that In q
shock such as gun wonld DO subjected to tho