The Cheyenne daily leader. [volume] (Cheyenne, Wyo.) 1870-1884, 1878-02-03
SCIENTIFIC.

PHoToGRAPuY.-Of all the discovcrie,
Of modern times, nothing has done moro tc
refine the taste and educate the multitude
to love of the fine arts than the science
OF Photography.
From the time that Daguerre discovered
the method Of developing the latent image
on the silver plate, and Talbot the Calotype
or paper negative, the march hns been
onward, onward. And scarcely year passes
without some Improvement, either in the
permannecy or the artistic effect or the ar-
rangement Of light and shade.
A report comes from Munich, Bavaria,
that process for photographing in colors
has been discovered. Three photographs
are taken. The first Is on plate which is
sensitive to yellow rays only; the negative
of this is printed by photo -lithography in
yellow ink. Tho second photograph is
trom plate only sensitive to blue rays,
and the printing from this is with blue ink.
overlaying tho first printing The third
photograph is Of red, and the proceedings
are similar with red ink. The colors thus
blended in printing ore said to give the
natural tints. 1t is possible that success
may ultimately attend experiments of this
character, but it seems highly improbable
That plates Gun be prepared which will only
photograph red, yellow or blue separately.
While we love to hear of progress abroad.
we love to note such q. home. Messrs.
Price & Campbell, experts in the art, at $50
Broadway, N. Y. city, have produced u
marvellous brilliancy and finish in all Of
their work, especially in the beautiful
Ivory Cameotyps Portrait" in invention
Of their own which is fast gaining reputation
and popularity. The result is most beauti-
full, tho effect being Of Astereoscopic nature
and resembling bas relief. The combina-
ton of the artistic, chemical, and mechanical
skill is certainly crcditablo in the extreme.
We predict for these sliilled artists bright
future.
AsBEsTos.-The wonderful mineral As
bestos is not only indest,ucti5ie by fire or
acids, but differs from nll other known min
eral substances in possessing fbres resem-
bling silk or fax, some varieties of which
can be spun, woven or felted, producing
cloth, felted sheets, paper, ETC., of o supe-
rior quality. The ordinary varieties can be
reduced into flock, pulp, or impalpable
6bre, in all of which forms it retains its
peculiar fibrous and interlacing or binding
| properties.
Asbestos derives its name from Greek
words, meaning unchanged by fire. Its
noncombustible qualities were known to
the ancients, who made cloth from it in
which the dead were wrapped preparatory
to burning, and in which the ashes Of the
body were saved.
| The finer kinds. which are pure, whito
md silky, with lor s'rong fbres, are com
paratively rare All . .pensive, and being
free from "silex." licic acid, /" are par
ticularly valuable =. their lubricating
qualities, while ths " I'd and more com.
pact forms are qu,t thundant. But on
account of its suppos. scarcity, no practi.
cal use had been nIaue of it until about
twenty years since, when it was first util-
lied in combination with other materials, in
the manufacture of articles for structural
and mechanical purposes, for which it has
proved of great value.
Asbestos is capable of receiving and re-
taiuing the most brilliant colors is u non
conductor Of heat, and possesses many othel
valuable qualities, which have been develop
ed for new and important uses.
This valuable mineral has been brough
to light in vast quantities in many parts o.
this and other countries, ard its peculia,
properties and uses are now known in al
parts Of the civilized world.