The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1892-09-17
SCIENCE AND INDUSTRY.

"A journal published st Constanti.
nople gives some particulars of the mer-
cury mines Of Amaden, where about
5000 worlsmen are employed in this un-
healthy industry. The production
reaches $4,000 to 10000 frescoes (t00
pounds each) per annum.
India is becoming formidable rival
to Russia, says the Levant Herald, in
the production of wheat The export
of India wheat to Europe in 1890 was
672 125 tons; in 1891 IL was 1897, ,466
tons, or more than doubled, and the ex-
ports for 1892 have more than quintu-
pied, reaching 6,s42, 900 tons.
DR.. Dareste has demonstrated that
monsters and monstrocities during ami
NAL development are not the results Of
pathological changes in the embryo, as
hitherto supposed, but notifications of
the processes of organic evolution, such
as bring about the difference between
individuals and races in mankind.
According to the statement issued
by Commissioner Whitman, the earn
ings of Michigan railroad companies
from January to May 1, 1892, were
s32, 1913, ,O315s, or "a, 3s7, ,2O3 AZ more than
for the same period in 1891, an increase
of 1873 per cent
-Goldthwaite's Geographical Maga-
zine gives the area of the worlds coal
fields in square miles as follows: China
and Japan, 200, 900; United States, 1884,
900; India, 50, 900; Russia, 81, 900; Great
Britain 5000; Germany, 5000; France,
| 1,S00; Belgium, Spain and other Euro
pean states 1900
The tenth census bulletin recently
issued by the Dominion statistician
shows an increase of about $3.50, 900, 900
in the value of industrial products,
under the national policy, during the
last ten years. The capital invested in
the new provinces of British Columbia
and Manitoba has increased by S15, ,60O,-
900, in Ontario by s95, 900, 900, in Quebec
by $4,000, 900 and in the Maritime
provinces by SIS, 600, OOO
The New York state board of chari-
ties is preparing an industrial exhibit
FOR the worlds fair of the products of
the charitable, corrective, reformatory
and eleemosynary institutions under it's
supervision. The exhibit will contain
photographs, models, illustrations of
the various methods of instruction,
statistics, and a comparison showing
the progress of work for the past twen-
ty-five years
| There is curious snake (hydraci
Yeti in South Africa that lives wholly
upon birds eggs. 1t has no teeth OF
signs of teeth in the mouth, the dental
array being located in the stomach.
Buckland says that they are not true
| teeth, but that they serve all the pur-
poses. They grow from the center of
each vertebre. They pass through
the walls of the stomach and are COW
cred with enamel just like true teeth.
| This is a natures provision for break
ing eggs without running the risk of
| losing the precious contents, as would
be the case if this egg-eating serpent
had its teeth in the proper place. When
the egg is safe inside, the abdominal
walls contract and crush it against the
long row of verte bral teeth.
| Amateurs in physical science, who
like to dabble in experiments, may be
interested in knowing method of illus
trating vortex circles as described by
Prof. Dolbear, the inventor of the Dol
bear telephone. Take little box, he
says, fill it with cotton batting, make a
little hole in the top and set the cotton
on fire. Then, as you tap the bottom of
the box, the smoke will pour out in
rings exactly as we often see it blow
out from locomotive smokestack,
when the engineer is amusing rustic
observers by the roadside. The odd
point about the illustration lies in the
fact that even if the second ring is
larger than the first, being sent out
with more speed, it shortens its diane
ter when it reaches its predecessor,
passes through that first circle, and
then, while hurrying on, resumes its
original larger shape.
Prof. Dewar, in lecturing before the
Royal Institute, London, handed around
to the audience an entirely new thing
in the way of tipples, in the shape of
claret glasses filled with liquefied air.
The boiling point of liquid air is one
hundred and min ety-two degrees Cent?
grade, or ten degrees lower than that
of oxygen. After liquefying oxygen,
Prof. Dewar said that it is not true, as
has been supposed, that the oxygen in
the air liqueties before the other ele-
ments in air; on the con trary, the air
liqueties us air, and is not resolved into
its elements before liquefying. If this
globe were cooled down to two hundred
degrees below the zero of Centigrade it
would be covered with a sea of liquefied
gas thirty-fve feet deep, of which about
seven feet would be liquid OXYGEN
n. Y. Commercial Advertiser.