The sun. [volume] (New York [N.Y.]) 1833-1916, 1894-01-14
xorrs ON SCIENCE AVID Iypr,r,.

|
Tbs TACT ia well known that a miSfut. =,
| tunpstep with steol tr,ports q, ~ -. VI
! 80. -. ~, , =" we Iai'etto
| steN NeE'eo ~ h't"HeSs thN 10 read "
| scratches glass and quartz. Recent invcs,t.,.
| tlons have thrown Heh. upon this s,,,,,,1,
80 .',.,' "'Vu t"s e.mewhh
remarSaole phenomenon mat Is, definitely
| crystalltaed compound OF iron and turEst.n+ III,
| announced ms having lately been di...,,,,'
| 'ne Clys'a'e "u'"S sn ""'u is 20 Dc caiahte 81
nola','''nE 80" ~" y ot"Ie whts
n,e's a.iuVsV 90 'sN, az Eo,u anu 'he crys.
liz pttnn,tioy ~ rn, WIN Iton n
| tungsten. are silver gray and very briis,,t
| The conclusion arrived az hy exports IA TIA
staai a"noe of ibs CON nonnJ i,is, ",,ogs! Tth
| tormod in the mass. 'thetc3y rroducin: tHc,a'
| mnrknhle increase IN We hardbess o; steel
A"" "u9'"E W i'' u''l N'ue'''
Txnerimsnts made with view 10 ob,,i,,..
| -. ..it-ti. - - =, ..,t.., ~ ''''ns
nofe reiIaoIe ne,hous VI NS,irn".'hE inc qua.
| bscn mnde abroad and the rcsuIts r,,o.l.,
~ ,ai,a,w.s Ill .,,tho. oLo,,ti '.'"'uel
least sign Of superficial cracking when hentto
| an angle OF 1870 degrees after five hours -.
nosurn in a cIossd air h,tn =, to,,,.r.,.,.
10 degrees G., the thickness % tho test
pieces 10 De - rubber that docs not contain
more than nall it's weight OF metallic oxides
should stretch to I'VE times us lenEih with.
cent The s,ttobnr ,s.d In its S,,i ',ni W, *
rubber should stretch to at least 60, en- times
us length without rupture, HnI IN" extension
nnt sSneed IL ,,cp ,.cnt Of Tho 6riyinaI |u
with given dimensions suprlenesa NAV h..
determined ~ measuring THO percentage u
stance and This may form lie basis for
In q between different grades OF rubber in thNrv
adaptation to certain purposes finally Vulcan-
A writer in the IToHen- Geirsrbs states that a,
water. lie now prepared by diluttng pounds
and o., ounces nitric acid OF /. & specific gray.
a., ,.t,L ~ n..,, 80. to- - -
w WIZ" oi' dua''' "a'er' inv "I'ch -'-'1
pounds Of starch are stirred. This mass
M $500. " ", f:.,'o
the cakes nro then ground and tho powderx
stited. anu heated from 2l2' to $50 Iahrcn-
heit Tor ono or one and q haIt hours; int
He isin vi from stsrcb hSr r
iectly free from nitric acid. In the preparation
Q. dextrine in tho vet way with a. ,uted Grd, Z
~ tarb n n a .' NY, Sart a. o'I ~ o!
must be carefully noted MS the continue in.
huence OF the acid causes the dextrlne to bs-
so"io i"''o''
b. means of an ingoniously arranged app~
ratus the strength OF old betting is now re-
newed or augmented to such a degree as
greatly 10 lengthen It's service. oaccompllNh
this two large hollow copper cylinders ara
provi,J.J and int, tbo.o s,o,,n 10 .d,,it,oJ ~,
-, a"u ~ ' sIo"H - "u"i't'o"' ~
that they are always heated. in tank ia n
starch md ,noIassea nran.rod In aoual ou,r.
e '', ~ ptep".ou III eI."' du""
tues. THIS solution beinH IN llquid form and
there are guide rollers. through which runs
,ho too,h.r n,I.I,o ,bioh "a IN ,rooo.o =, ,r.at
mani 'rba half 70 he nnoratad nnon "a stort
na inio tba n, .cbi,e AZ n poipt phare n cnn an
isttsr tbs isadher receives an annIicstion W" ~;
the solution; the press rollers Immediately !
al
over whieh Inc beItina "a beine drawn drIs;
the compound Ali the rollers and cylinders
rest rest! ID me bearings, AS represented' ths APP
medinteiy diving ia TO add strenpfh 70 ths
tibre Of the leather in n remarkable degree.
,,,
ueser'P'ioh appears IN inc n'o's'a H,'e'"''
tea nnh'Sr.a'e oil a new barometer oil high sem
Tbe ann.ratus consista a, N yar,icoI tuhs
go, -. "pua."'ts ,p,ns's. y, 1ef., aS s w."
one m in length the bottom OF which Is curved
Il, ,ha o.dinarv ,nornsr',h onanina =, ,ba
top. however. being furnished with steel peg
screwed In an iron collar attached to tho tube.
q long cari h tnoe One MN, In a,ame
anova fha curyan M, ana tsorniUsttrn'In'
an an open reeeptacle' The dnaatity OF mercury
10 nuE :, LII II liz ,iJdio "; az
"a nIliarv tHbe ,rbs siIIbtas, differancs ~
70 Use nnd act on ths "a niIiary coI,,mn and
fall OF pressure is indicated by the inverse
movement OF me coinm m, In ms way me IN,
lube is AUGMENTED According to the section Of
the tubes, and in this case as 400 is to ono so
ina t shriat ng o. ~ %. m''i,he.er San
become great enough to cause the meniscus
to leave the capillary tube that may ne remn-
disd oy serewing OF uhscrewlhg the upperpeG'
succas.,u, tntroduc,io, "a ,anortad q, N.
new Kind OF screw steamer butt in England
for navigating tho shallow rivers o! Fast
Ifr,cn m. crnft In this ips,nnco h.ipg .oua
.. - 80 49, - - '"'o 'V'"o
40 teet long with ieet peam' anc drawing
only IL inches of water: the bottom is per
fan,Iv fat and tbe how is NJ snoon sbana Rp,
80, 80. 80 ."' "" 80 - "Hoo, ''"Ho ~
the chlet novelty mentioned as characteflhlEg
this boat Is the provision for keeping the
scraU which has n dIanatsr of tvo feat .ub
marpad Ills difiicuIty heinz mat by' bayinr tbs
.InT ~ ~, '",o ,1 Vii ~ nv. 81 hT,o
snI hUiidI,g snr, ~ boriynntoi tHn
naI oyar tnss. "nro1aitar' snn', C,,mar