St. Landry democrat., 1892-07-23
POPULAR SCIENCE.

In all artificial light the waste is over
ninety per cent.
Seventy three per cent. of the railroad
passenger cars of Massachusetts, are heated
by steam.
There are 413 species of trees found
within the limits of the United States
and Territories.
The banana yields larger supply OF
food for man than any other plant Oh
similar extent of ground.
1t has been scientifically demonstrated
that the earth>s axis once every f3i DAYS
undergoes distinct oscillation.
The microscopes say that mosquito
has twenty. two ''te2th' in the end OF ITS
biII-eleven above aud the same below.
The corporation of Glasgow, Scotland,
is about to erect gene rating station
large enough to supply 10000 lncandcs-
cent electric lamps.
In testing the conditions of the atmo2-
phere inside petroleum tank, if the air
at the bottom is found not inhammable
or explosive the air above is sure not to
be so.
A new cure for hydrophoba was sue
cessfulIy tried in the PAstenr Institute at
Milan, italy. 1t consisted of subcu'
taneous injection of the virus IN the
"ixed form
A further great reduction in the cost
of aluminium has been hoped for hy NJ.
Faure, whose process consists IN obtain
inc CHEAP aluminium chloride aud de.
composing it electrically. Ihe chtorlne
would be a valuable bye product. The
commercial success of the plan, however,
is not yet assured
1t has been found that By passing
mixed hydrogen and carbonic oxide over
nickel and cobalt they can be separated.
Then by applying the hydrogen to strips
of platinum, a powerful primary battery
| is formed which will yield, it is stated:
fifty per cent of the total energy In the
hydrogen absorbed.
An installation of electric light IS be
ing laid down in the B .tlgnolles Tunnel
near Paris, France, in which the mean
descent lamps are place | at height OF
| about fifteen feet above the rails. The
light is received by plates OF FURNISHED
tin covered with glass, which reflect Il
soft and agreeable light into the carriages
Long distance photography is rendered
quite successful by a new camera with
telescope objective, which consists OF
concave lens of short focus and a conve'
lens of considerable length OF tocu7
These are put at a certain distance apart
depending on the difference of the twt
foci. By the laws of optics this arrange
ment projects an inverted image OF Al
object at long distance from the lenses
A photograph by DR.. Gill, presente
to the Paris Academy, shows from
80, 900 to 200 stars, besides two
nebulp, in an area Of four square de
grees. The exposure was over three
hours, instead of one hour as arrange
for plates of the international chart o
the heavens; aud if such exposure wer
possible for the entire man, 1t Is though
that 800, 100000 star: would recorC
their existence, instead of 81, 0Oo,o
DR.. Griesbach of the Geological SUI
vev of India, who has returned to Rar
COON from tour of exploration to til
north Of the Bhamo, reports that nea
Myitkina, in district absolutely unit
habited, he has discovered most remark
able alluvial gold deposits, stretching to
a great distance up the course of stream
and no less than fifteen miles IN WIDTH
A ton of alluval deposit produced twent
five grains of gold. Lead also has bee
o | found in abundance.