The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-07-10
xorKs ON SCIENCE AND INDUSTRY.

medium. relating particularly 70 tho uso for,
this purpose OF blocks. slabs. or tiles in COM
bination with n preparatory cement or compo-
sition. Tho first coating consists ot n cement
formed from ground slate mixed into n paste
with siirate of syda or water glass; and upon
this cement az "A foundation Is Applied. while it
Is in an adhesive state. b!o"k5 or slabs formed
by mixing together about one pound or
sr0Tga. Es n pa one ps part 9, Portland
luton Of water glass The hlooks or slabs.
a'te- being moulded. are allowed TO become
dry: aud are then Placed IN rosi,ton up1n tho
stces MED in with the same mixture OF which
the blocks or slabs are composeii ur., instead
oil using clocks in tho manner indicated. a COM
hnat!un may be cn1plOy with the nrcpara-
tory cement OF blocks Or tiles made from
resisting material.
Ono OF tho most useful combinations Of
IMMORAL and vegetable substances. OF recent
introduction in the manufacture Of goods Of
various kinds. is that OF asbestos and India
! rubber some forms Of which lave proved
specially satisfactory. Woven sheetlng. for
instance. Of these materials consists Of as
bestos woven cloth. coated upon both sides
with India rubber. and then vulcani2ed: II 10
usei as u substitute for asbestos Dllibohrd
for packing. for steam POINTS. and IN other sit.
nations where 1t is desired to resist both heat
anu mo ,tnrc' while nhord,ng h.gh degree
washer ar another prJdact in tins line. arc
also asbestos aud lnC'R rubber woven tap FOR
| making steam md wafer Joints. Asnestrs
rolled "lo'h packing IL made both with rand
without India rubber core and What II known
rubber back. uppn which there are built up
odg.wisc "a numi!-r OF lafcrs OF asbestos rip'h:
Sufficient elasticityis by this mean, impaired
by the rubhe. bnck. Will" great d .rabiiitv and
Protection tothernbn.r ar" inentcd hy'he use
lean nst".to. is found lar superior to III" Tor.
slE l article, it. rrIneip9i GTa,ti.. 81 adai
rNiNS,i -
known acid, and also in the hghes' degree,
sr@ H. or .oar VI esns wG,s6 rv ~
FAVOR to piumb":o, soapstone. aud chalk.
In the manufacture % steel and in.ot on
some attention is Just now being paid t. Cas-
sons new process as carried on at his exile.
sive works in StaTordshirc. England. tac lur..
pose in Wow being to 50 carhurlGc the molten
metal that tho amount Of carbon resulting
may ba more or less accurately determined.
This is accomplished by introducing carton.
in the form OF charcoal, into the casting latle
and then tapping the metal direct from The
converter or furnace into the ladl. after ad d.
ing any desired quantity Of ferro- ma ngauese.
or other material: in this way. a. Is fond. u
hish nere.ntaGe OF carbon can he rad.
high grade " Of steel g produsea in pra an
that IS. to produce Il high grade Of steel carn-
Die Of standing from twen'v-siX to thirty-iour
about five pounds OF timely ground charcoal
per ton OF metal. tho usual percentage OF
ferro- manganese being also somewhat in.
creased. Other forms OF carbon than wood
charcoal may also. it is stated. I've employed.
SO long AS they do not contain such high per-
centage Of sulphur or othe. ingredients as
| would be injurious to the resultant steel.
The underwriting of coal by machinery IT,
now claimed to be greatly facilitated by means
Of n newly designed arc apparatus. involving.
it is asserted. u decided Improvement on the,
| usual principle OF construction in vogue. A.
heavy iron base cast in one piece serves as q
foundation for oil the parts. carrying two pairs
OF axles. one at right angles with the other:
the gauge OF one pair is fixed to suit the regu-,
ter is to work. and these axles carry small
| Hanged wheels upon which the cutter is easily
moyed about the mine. and in and out &C;
| aHles carry small wheels for supporting the
cutter when in actual Gbrersti2n and car.
theyare not Hanged. hut are kept on the track
by two pnirs Of single and two pairs Of double
easily changed from one pair OF a1los to the
On other by means OF a cam worked by screws,
the way when tho cutter is moving, The mo-
tive power is furnished By a fifteen -horsey
all T1 dsnces
| mechanical injury, The armature shaft car.
RES beve!led pinion at each end, that nearest
means OF a controlling lever either, one Of two
beyelled gears. thus Giving the shaft on the
and. by an ingenious arrangement this shaft
| operates the feed chain ut practically any de-
| sired speed.
For recovering the down from the waste
| scraps Of beaver skins. enabling the substance,
| to be utilized afterwlrd profltahy as n garni-
| ture, a method has beer patented lately in
| France. tho main features Of which. as given
in the Recue de Ia Chape!lerie. are very simple.
The scraps are boiled with water for soms
| F,,i,r rnti fbn CHI &c
pletely cooked a process which. while it\
injurious effects upon the skin. tHt tends
product Of the boiling is washed in a thorough
manner in order to Hlimin 1T al neshy i'm.
| subsequently heated in an mir bath to n tom
perature not higher than seventy TO seventy
| brittle and is easily rubbed to powder under
| the thumb The material is now passed be-
the dried skin. and the down which Is then
| separatad from the dusty matter is found to-
be wei! adapted to tho hat industry.
! In an article on the management o! boiling;
! and pulleys recent writer directs attention
| to n lately devised arrangement which con-
| sists in the employment Of n specially pre-
| pared leather covering. which Is extremely
| soft and elastic ana does not glaze by the ruh-
| bling action Of the belt as is tn" case when
ordinary leather is employed FOR the purpose
|
| firmly to it for all time by means OF a specially
| prepared cement naio So AS TO be soft and to
| remain 80. unlike any OF tho ord nary
| cements or Clues. No rivcts Of any kind
| are required. tho nature of til" covering
| enabling it to hc FIRMLY AMI pcrmnnrntIy at
| tached g. the iron Of the pulley BY IN" c"lncnt
! alone The result realized b. tho use n this
device is tn" transmission of forty to my pnr
cont NOR" rpwer han Is prnc'iranl" by. ordi-
| narly prepared pullCys. whilt sirling is re-
| ducol to an imynrcrptiblo fnrtor tho great
| roint being to keep the covering free" I'm
| i,,uyinc and reasonably cln,tI This latter
| utsidegHtum Is in some cases accom- IllShri
| ny rynr.ng the iron pul!"ys with pnpcr. tho
| method cnn>istIng in first rendering til" pulley
| ais lutcly ire" from grease 10y means Of sal
| soda scratching the whole surta"" Win illr.
! victim: wi't diIuts II rio acid for ~ fcw min
Nc, t" d"adcn, tho SCRATCHES then cl"anine
with water and drying following this. the
PAPER being applied by winding " tn tho
strongest gue. or it may e W'ttcd with tanno
acid and applied as ah'y".
safety wirn for mines has boon devised
which does not throw spark when hy any ac-
ciIcnt tho wire is broken, tho novelty in this
, 10 int f,.rr -