New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1873-05-14


uuantity of the powder, filtered, and turther ut
luted Yields with solution OF IODINE tne chaiao
teristic blue starch reaction'
Ty,,pvp,1 or TIKI AIR IN MAKING BUTTER,
Recent experiments indicate that the best tempera-
ture of the air as well as Of the cream for rapid
hprnip of butter is from 54c to 59o instead OF the
AVERAGE Of GO as generally taken. A cellar, with
teunperature regulated by means OF theIh9in1S@I,
seems most suitable for the purpose espeoiaily III
Summer.
s,,x WITHOUT THE SnK-woRM-It is said that
the italian manufactures, Marasi, has patented
very simple process for the production Of silk from
the bark of the mulberry tree, in which chemical
agents previously unsuccessfully employed, such as
soda lime, &C., are dispensed with. Fibers are said
tobe obtained entirely free from parenchyma, andre
sembling in color appearance, fneness and strength
a specimen of Moorish silk. Similar statements
have however, heretofore proved unfounded'
Hor-GuDrNG OF IRoN.-The process of hot-giidlng
Of iron and similar metals, has been lately much
simplifed by Krchmann, who produces GIT designs
which are very uniform, and which bear poilShlng
This is done by rubbing the surface with sodaanla
gam (which amagamates it immedia5ey even u az
surface be oxidzedl. and then quickly apPSIns "
concentrated solution of chloride OF gold' anu en-
peling the mercury by the heat OF lamp OF furnaces
Similar results may be obtained with platinum anu
silver salts.
COATING PAPER WITH UkAfItllt' hO h'i
lowing process for coating paper with graphite has
loan natented by w N Lake of London. Unsized
paper AS in parchmentizng, is best, treated with
mixture of vol tuning sulphurio acid, and vol.
wafer AS soon as the surface seems geatnzed, the
naper is quickly removed and sprinkled with
graphite or other mineral substance as emery, &c,
on one or both sides; and then Immediately I'M
Tnersed in water containing little Soda and finally
carefully dried. This process is also adapted TO
fabrics of vegetable fiber
NICOTINE IN Observation-Disclosures by
DIR. Heubel do not confirm the alleged absence of
nicotine from tobacco smoke on the contrary, by
condensing smoke from cigars and washing it IN
water and alcohol he obtained solution which was
capable of producing the effects of nicotine; and
he also detected its presence, chemically in the form
of the SALTS more permanent at high temperatures.
The effect of smoking he concludes, must therefore
be ascrihed in part at least, to the absorption OF
nicotine though other substances may act with thls
poison
LITHIUM IN PLANTs.-By means of the spectre
scope thium has been detected in the ashes of many
plants. DR.. FOcke states that it is found so con-
stanty in some species, especially of the genera
Jhalctruu CardVus CIsiHia and SGlUid meadow rue,
thistles and sage) while other plants growing with
them are wholly free from it, that probably this sub
stance is essential TO their perfect development Eu-
r0pean and Columbian species OF tobacco may be
distinguished from those of North America and
Brazil by the very much larger proportion of llthlum
III their composition
INERAsIBLE STAMpING-INK FOR LINEN &C.
Professor B0ttger gives the following formula of an
ink for marking linen, &c. that he maintains TO be
entirely unaffected by chloride of lime, cyanide of
potassium caustc potash, or acids Digest coarsey-
powdered cashew nuts, for some time, at moderate
temperature in closed flask, with petroleum
naptha; then allow the exceedingly volatile solvent
TO evapOrate. After marking articles with the re-
smiling Iguld. mOlSten the place Win aqua
ammonia or lime water and the marks will instantly
assume deep, permanent black color.
PREVENTION OF MERcURIAL PoIsONING.-Jules
Never an employ6 in French mirror factory, has
lately ascertaned that by scattering through
the working rooms pint half-pnt Of aqua
ammonia every evening all danger from the ABSORB
ton of mercurial vapors will be in measure pre-
vented. This practice has now been in use for sew
eral years in his establishment without the occur
renee of anv new attack of mercurial poisoning
while no further difficulty has been experienced by
persons who had been previously affected No
PLANTATION has been offered TO the theory OF the
action of the ammonia
DETECTION OF ORGANIC MATTER IN THE ATMOs-
PHERE.-Mr. A. II. Since closes glass funnel by
drawing out its neck to a fine point. places it in
stand and fills il with ice He allows the aqueous
vapor that condenses from the atmosphere on the
outside to drop into a vessel, and measures the
quantity thus accumulated in given time and
determines the ammonia by one of the usual
methods. BY this means, called "distillation by
cold" substances that are decOmposed by hlgh
temperature can be condensed; The perfume OF
flowers for example, can be distilled by placing
them under bell-jar with the funnel
LOCALITY OF THE MATERIAL OF CHINESE PoRCE-
IAIN-The locality of the material employed in
China for nearly three thousand years. in the manu-
facture of porcelain has been found by Richthofen
to occur east of Lake Poyan, in the direction Of
Hongtchow. 1t Is a stone of the hardness of field
SPAR of green color, and aspery appearance strait
fled between clay-sate. 1t is converted into fine
powder by pounding, the finer portions being re-
peatedly separated and nodded into small bricks
The Chinese recognize two sorts of the crushed ma
terial. almost identical in appearance. The region
abOunds in most luXUTant vegetation, Including
Szaleas rhodOdendrOns, &c.
TESTS PoR Notwithstanding to P. Geyot if
gilt surface be touched with drop Of chloride OF
gold OF nitrate of silver solution, the former will
produce brown, the latter gray spot if the coat
ing be an alloy but will have no effect upon pure
gold For gilt paper moisten with drop of chloride
of sulphur which will Immediately produce dark
brown margin, If the covering is not pure gold.
Metallic spangles, shaken IN closed TASKS with
chloride of sulphur suffer change, If gold; other
wise they gradually darken; but II under slight
DressuTe as in Theoretically sealed tubes gold
spangles disappear IN short time by conversion INTO
chloride OF gold.
ISOCULATING HEALTHY ANIMALS WITH TUBERCU-
IOUs MATTER.-FTom a series Of experiments by
Chauyeau upon the possibility Of transmitting pull
monary diseases to healthy animals, he concludes
that with COWS, lambs horses etc, the only thing
that will reproduce tuberculosis is the granulation,
OF the cheesy tubercuous substance from the human
being affected with phthisis The other products Of
lung decomposition only develop transitory infam-
nation OF the spot affected; but when the tuber-
introduced