The Cincinnati daily star. [volume] ([Cincinnati, Ohio]) 1875-1880, 1879-11-28
soINrILLATIONs OF SCIENCE.
Manufacturers of Lyons are introdr

ing Photographic Impressions on silk OF
pictures by the old masters, and Of more
modern works of art. No description is
given of the process. ska i..e.
The Louis Maiche battery has platin-
lied coke and analgamated zinc elements.
The zinc is sunk deeply in solution of
sal-ammoniac, but the platinized coke is
but slightly inserted in the liquid, in
order to give it a large atmospheric ex-
posure. e". -sar..
Clamond's new thermo-electric battery
for the production of the electric light is
said (C0mptes Rendus, No. 6,) to pro-
duce current capable of giving from
four lamps an Illuminating power equal
to one hundred Carcel burners, with a
consumption of only 9.5 kilos of coke.
With regard to the degree of tempera-
ture at which men can work in tunnel
ing high mountains, Prof. Dubois-Ray-
nond says it is possible that work can
be carried on for short time at co.
Csntigrade, if the atmosphere is dry, but
not beyond 400 when the air is satur-
ateQ with moisture.
THE Nature reports the discovery, by
laborers, of an ancient burial-place while
they were making road near Colberg,
in Pomerania. Twenty urns were found.
Most of them had been shattered by the
penetration of roots of trees and by other
causes. Three large and two smaller
urns were found to be intact. Among
the contents of the urns were one iron
needle and two iron rings, besides a
quantity of glass beads and rings and
needles of bronze.
Some, or rather most, people will re-
member the furore caused by the So
called tempered glass, invented by M De
La Bastie, and the multiplicity of pur-
poses for which it was said to be emil
nently adapted. But the lamp-chimneys,
beakers, &C., made of that material had a
fatal facility of suddenly exploding into
a thousand fragments, sometimes spon-
taneously. 1t is now announced that De
La Bastie has made such Improvements
in his glass-tempering process that the
quality of the product is immensely more
durable. .....
Prof. Corfeld, in an address on sani-
tary fallacies, delivered before the late
Sanitary Congress at Corydon, England,
considered the utter condemnation of
alcoholic liquors a mistake. "There are
those-and l think there always will be-
who can not believe that the exquisite
bouquet of the wines of France, of Italy,
and of Spain, is only fit to be smelled;
there may be even those who are wicked
enough to insinuate that if people do not
taste them they show a lamentable de.
ficiency in the cultivation Of an import
ant sense"
Elster disputes in the Complies Rendus,
No. 6, of this year, that jet of water
rubbing against another jet develops
electricity. He does not find anything
to support the assertion; but there is a
development of electricity if liquid
jet is directed against non-conducting
body. As to the production of electric
| ity in capillary. tubes, Elster holds that
| it is to be attributed not to molecular
| friction, but to the change or transmuta.
ton of energy caused by the friction OF
the liquid against the sides of the tube.
The danger incurred by eating trichi-
nous meat is we'll known. Fortunately,
the presence of trichine can easily be
detected with the microscope, and per-
sons who like pork would do we'll to
cause careful inspection to be made of
that article of diet before allowing it to
appear on the table. In this country
where there is an aversion to paternal
functions of government individual effort
must be constantly exerted in order te
secure such action on the part of dealers
in pork and other kinds of food that the
articles they sell will be pure and whole
some. People will get just what they in
sist on getting; or what they are willin,
to take. In Berlin, however, where tn,
authorities do great deal for the inhab
itants which we prefer to do for ourselves
every pig killed must be examined will
the microscope before it is sold, OF pen
atty will be inflicted. Here simple
withdrawal of custom has proved yer,
efficient check for careless or dishones
butchers and other vendors of food.
There seems to be an impression her
that the copying devices known as tn
hectograph and the chromograph hav
slabs or tablets of the same composition
The following information from "Ding
ler's" may be of interest: Both tablet
are protected by fiat tin boxes. The tab
let of the hectograph is composed of
mixture of gelatine, syrup, glycerol, an,
acetic acid. The acetic acid makes til
glycerine somewhat soluble, and tn
syrup and the glycerol keep the gelatin
from getting hard. The tablet of tn
chromograph is made Of a mixture of 10
grammes of the best gelatine melted wit
400 to 500 cubic centimetres of thic
precipitate of barium sulphate in basi
on a water-bath, to which 10
grammes dextrine are added Will
the mixture is constantly stirred, and
lastly, 1000 to ], 200 grammes Of glycerol
When the mixture is cooled sufficiently
it is poured into the fat tin box an
allowed to solidify. A thick aniline in
is used for writing the original on glaze
paper. The written side Of the pape
| isi placed on the tablet, and the latte
| okaorhs eno,1oh of tho ink 10 maka