New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1875-02-09
APPLIED SCIENCE.

GoipRN VARNIsH FOR LEATHER.-This varh'Sn' /
employed for mparting to leather luster reseu-
bling that of the golden beetle, by simply prusnius
Il on with broad brush according to
of B0ttger, consists of o somewhat cohOss haIIae
solution Of fuchsin In an alcohonc soIuVon Vi '"
TuNGsTEN-STEEI--A simple and certain pro0esA
1t is claimed, has been perfected by bernSn" oi
Hanover, by which white, exceedingly para ana
brittle cast ron containing from 10 ~ pef vent Oh
tungsten can be produced, which 10 adapted 10
chilled work. and can be added 10 oasV nun III any
proportions
DIABETES ACKNOWLEDGEMENTS 10 III
Schmitz, diabetes. that much-dreaded disease. ID
almost always the result of cOngenital predisposi-
ton mental anxiety, severe pain, injuries of va,
rious kinds etc, whether they affect the nerves OF
the system or not being powerless to bring about
the affection without an inherited tendency to IT,
INHALATION OF OXYGEN MIXED WITH AIR by
DIVERS &C.-It is stated by Gaudin that in repeat
ing the experiments of Touzet by the inhalation OF
amixture of equal parts of air and oxygen, he ex-
perienced an unusually comfortable sensation
which so far removed the disposition to continue
respiration that he could hold his and close DIS
mouth without any discomfort for two minntes-a
fact which, he suggests. may be OF service 10 uNeS
DUSr-SPEcTAcLrs. FOR THE PROTECTION OF Ihh
EYES IN VARIOUS OCCUPAnoNs.--Spectace frames,
IuTnlkIcu WlIn INC Nlio edtnO WoV'"N VI -
carefully fitted TO the eye and fastened to the head
by a gum band, have been found by KILN to an
swer perfectly for the protection of the eyes from
dust. solid particles &c. III various occupations as
threshing stone-cutting, DC. whlle they Nv t tho
same time. permit the necessary access Oh an 70 o
ave and produce no inconvenience whatever 70 inc
weaTeT
THE EVAPORATION OF METALS BY ELECTRICITY
MI HOPKINS describes an interesting experiment.
i'm DasSiDy a charQe of electricity
through a very fine Tread of platinum, or other
metallic foil the thu .ad being kept in place between
slides of microscope glass The effect Of the heat
from the electric discharge is to vaporze the metal
which is instantly condensed III Transparent layer
upon the cold glass, which can then oe studieu ~
the microscope and can be used in various ways 10
determine the character of the metal and the pecu-
liaritios of the discharge.
TIE SPECTRUM OF TIE AURORA BoREALIs.-The
late Prof. AngStrom. who at no time accepted the
theory that the spectra of gases varied with the
pressure and temperature and chemical process, ad-
vanced the opinion that the spectrum of the aurora
borealis is composed Of two different superposed
spectra the one consisting Of extremely feeble bands
of hight, belonging 10 the spectrum OF the negative
pole the other consisting of q sin Gle strong yellow
hne, which is Characteristic OF the aurora, ana
which. AngstrOm believed, owes its origin t. huor-
escence OF phosphoresconce
Earthquakes AND MAGNETIC DISTURBANCE
Mir. Lamont, Director of the Observatory at Munich
says that many eases are known where magnetic
disturbances coincide with earthquakes, and states
that on April 49, he by chance the needle OF the
declination instrument receive sudden jerk the
oscillations continuing for soma time. After some
DAYS he received that violent oscillations OF
the needle had been observed in Parma and snbSe-
guent computations showed that the movement iad
begun at The same moment in Parma and III Munich;
while. later still, reports were received OF violent
earthquake occurring simultaneously III Greece
MANUFACTURE or SrEARIC ACID.-ln order TO
facilitate the removal Of the oleic acid in the man
ufacture Of stearc acid Desz suggests the addition
of 20 per cent OF bisulphide of carbon to the mass
before pressing since but pressing in the cold will
then be required toremove the Oloic acid thus diluted,
and the bsup hide easily he removed by dstilla-
ton The process is. however, con idered objection
she by Prof Heeren account of the unavoidable
lss of bisulphe. rs well rs the righteousness OF Us
yapOr 60 the operatives. lie regards the idea, mean
time, as a good one and thinks the substitution OF
less volatile ard injurious liquid ,aS petroleum
paphth,l fOr the bisthph.de. Is Wei worth trying
VALUE or AsCLrPIAs SYIIACA as FmER.--M. Roux
ealls attention to the value of tire common milk
weed lAsclerias Syriacal, abundant along road
sides in the United States, furnishing an i'm
portant hber possessing numerous points OF supe-
riority the common hemp, especially in view of
the fact that II accommodates itself to barren
dte. and not dieclons, it produces on given area
q greater number of plants, and therefore, the
amount Of textile fiber IS much greater. 1t begins
e. grow toward the end of April, and flowers IN
July. II succeeds especially well in dry seasons
Tile hight of its stalks is about live feet and its
pulp furnishes most excellent material Tor paper
HYBRID FlsH-Dr. l.. }. FitzinGcr has been prose
cutting some experiments upon the bastard forms Of
Sdl1aOnidq now so extensively cultivated in the fish
breeding establishments of Germany. ard which, as
Is well known. attain to maturity and produce
petely formed eggs. However as the result of
careful senes of experiments. he ascertained under
artificial impr5 laLion these eggs never develop
beyond the period of the formation of the eye speck5
after which they speedily perish. The hybrds upon
which the experiments prosecuted were OBJ
tanned from the female trout (ITHhG LdcWstis and
the male saibling (Ndia0 HOlrolinuS) and from the
female saiblIBg and the male trout tIrotd Jdrre).
He thinks that the nferlity of the eggs from these
b. birds may be considered as established fact
IL the same article reference Is made to what IL
called the Silver trout SdiaO SchtcgeT Muller, ana
the opinion expressed that this is sterile iorm but
that il impossible 20 say from what species 1t IS
derived, or whether it is constant.
PRoCrss FOR TOCGHEyIyG GLASs-Considcrable
attention has lately been directed in France to a
process invented BY De la Bastic for strengthening
glass so as TO render II both hail and freprOof.
sheet of unprepared glass. quarter OF inch
thick, held in a wooden frame, placed on the
door of a room, and brass ball weighing about
three ounces was let fail on it from hight which
was gradually increased until the glass was broken
bc the shock. IL was found that the unprepared
glass was broken when the ball fell from hight of
ten inches a sheet Of glass only half the thickness
but which had been prepared by tho new process,
was then plac in the frame, the same weight
allowed 10 fall upon it from gradually increasing
hight, but without ef6Ct even when dropped