New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-09-28

,nhes psually regarded formed of silica fused oy
electrical discharges according to analyses oy
Scholz consist essentially OF carbonates OF tue ah
line earths about So per cent being carbonate VI
lime and IL per cent carbonate oil suOh'ia
wr1cUT1SG SILK WITH SUIPHATE OF BARYrA.-
Cheyalier treats the silk 10 minutes, In Doll
ing solution of Glaubers salt. of 26' baume, 'nen
immerses 10 minutes in boiling solution OF cuiolIuo
of barinm. of $40 Baume and finally washes. he
operations are repeated several times, accoru's "
the strength of the charge DESIRED 1he oavnsi
shonId he alkaline, but their temperature anu
.Jooree Of concentration NAV be greatly varied as
the circumstances require; the former may even uo
as low as 500. All the usual operations Can oo 0'A
ried out atterward.
GrrNNEp ADHESIVE PAPER.-Paper recently lntro-
duced into the market in sheets, hair Oh winch arc
uummed on both sides and the other nan on one
side and divided into strips and squares OF dierent
sizes by perforatons, like sheets OF postage stamps
promises to be very convenient in many ways-the
doubIv- oummed answering for fixing drawings in
books labels on glass; &c 1t IS stated that the lA
tnre by which il is coated is prepared by dlssoYpg
SIX parts OF glue previously soaS9u rde o rS Of m
nrabc IN tWenty-tour parts OF water % Tue alo VI
heat,
Dvr1vc WITH ANIIINE BLAcK.-Accordlng TO a
process patented in France, the articles are hrst
staened for two hours in o solution of 6pounds Oh
iron in % pounds of hydrochlonc acid and n gal
Ions of water after addition of enough water 10
bring if to 19o Baum6. They iare then exposed 10
the air for 10 hours and finally dyed by heating
them in a water bath. in closed cylindrical VeSsei
capable of turning on an axis first to So, and theh
gradually up to 1929 at the close of the OPERATION 10
an anne-salt solution prepared ior 20 PSudS r "a
stulf az G. hounds of anne and ii pounds OF nynos
chloric acid TO which solution OF 80 Pou" H y,
chlorate of potash in gallons OF water mas peeh
Of hn nn -
sh"nrs and il Is fixed with bichromate of potash,
and the goods are finally drawn through an OIL DaVn'
NEW MATERIAL FOR DYEsTUFFs.-1t is claimed
that. according TO a method patented by Crolssant
and Bretonniere many kinds of refuse organic mat
ter. as sawdust, decayed wood, horn, bran starch,
moss. sc. can be converted into valuable material
for dyeing The process rests upon the dehydrogen-
alton of the substances by sulphur at high tempera-
lures. and seems very simple in practice. thus
bran, for example, is simply mixed TO q uniform
paste with the proper quantity of caustic soda and
flowers of sulphur, in an iron vessel, which is then
covered, and heated in furnace to 4S2G572'' A
norton of the sulphur is taken up by the organic
matter and much sulphureted hydrogen Is gwen
of; and, at the close of the operation, IRA
BILE microscopic mass remains wnlch is coinP pI
lyl soluble IN water, OF sap.gIeeu ooIoi
and exhibiting extraordinary afhnlty LOT DREAMY
fibers. so that they can be dyed wlth IL Without
mOrdant The dyes formed, even from lne same
substance NAV be varied In shade by altering the
Treatments and some materials require much
higher temperature than Others for their tahslOrna
ton.
EXPANSION OF EBoNITE BY HEAT-Kohlrausch
having accidentally observed that ebonte IDS SUCK
fast IN glass vessels, suspected that this material
might have a considerable expansibility by heat
and his expectation has been realized by finding
that II il about three times as expansible as zinc
THIS great expansion may possibly be connected
with the proportion Of sulphur which ebonite con-
tains. On the other land. the contrast with soft
raoutehouc is very remarkable. The increase OF
the coefIcient of expansion with temperature is
very considerable, One fact is mentioned reiating
TO the expansid5hat seems TO be of peculiar value
The bar of ebonie, winch was about een'lu.eteT III
thickness after being heated required consider
able time before il assumed constant lengtn'
Although the bad cOnductlvity is doubtless the
principal cause of this, the author THINKS th3t an
other agent also is at work. Like the elastic change
of form the expansion by heat may not take place
instantly, but continue itself after the change OF
temperature. A few observations by Mattmesen
with glass rods seem t9 point m t the eaSte
occurs in eminent degree In organic substances
CALCIUM IoDATE A VALUABLE ANTIsEPTIc.-
sonstadt has ascertained that calcium lOdate Is an
admirable antseptic. Among other results OF his
experiments. he found that the albumen from fresh
eggs treated with OO5 of gram of the iodate In
bottle kept sweet six months. Fresh herrings i'm
Inersed in a similar diluted solution of the iodate re-
manned good four days, and the peculiar rancid
favor of salt behring's may be entirely removed by
first soaking in water to remove the salt and then
immersing in the odate water Putrld rain water
becomes agreeable in taste after q hours if mixed
with one-ouarter its volume of the iodate water.
Rain water in which hundTed-thOusandth OF the
jodate is dissolved continues unchanged for year
Fresh butter covered with the solution Will Keep
three weeks and rancid butter Is improved by this
None Of the above articles of food, after being
treated as described, give any indications TO the
taste of the presence OF lodate when taken I'D large
doses, even To the amount OF one gram, acts IKE
dose of qunine and increases the appetite without
as is believed, producing any injurious effect
Sonsadt also holds that the lodate Will be useiul
i'm eases of infectious disease as alter exposure 10
foul odors he detected in himself the premOnltory
symptoms of typhoid attack, when entirely dls-
appeared on taking OIL gram OF the lodate IL has
also been successfully applied for curing t0othache
caused by the decay of the bone.
TIE HORIZONTAL PENDULUM.-Zollner describes
series of experiments with form of horizontal
pendulum of such surprising decacy that it opens
wide field for investigation 1t has indeed, been
shown that the instrument suggested by Z0llner
described and its uses suggested in the early part
of the present century. by Gruithuisen. whose ac-
count however had quite fallen into oblivion until
Z0llners reinventOn of the same delicate instru-
ment The apparatus consists of short horizontal
lever suspended by vertical piece of fine watch
spring, and carrying at the long end heavy leaden
weight aud mirror The short end prevented from
rising by a second watch spring fastened to the
ground below The two points of the support of the
lever. therefore, are nearly vertically above each
other and are eauidistant from the lever They
NAV be so adjusted that the pendulum will assume
n position of equilibrium around which 1t will
vibrate if disturbed; acting IN TACT pfeclsely IKE