The Republican. [volume] (Oakland, Md.) 1877-current, 1893-10-19
SCIENCE AND INDUSTRY.

All the Species Oh SHelIuSA
the carbonate of lime of which their
shells are formed from the sea. After
the death of the animals the shells
accumulate at the bottom of the ocean,
forming lofty mountains and .ast beds
of chalk
Among solids, glass is apparently
perfectly elastic. A plate of glass bent
under pressure and allowed to remain
under stress for twenty-five years,
when released and carefully tested for
any permanent set was found to have
returned to exactly its original sha pc.
1t is estimated that more than
200, 600, 900 bushels of corn will be har-
vested in Kansas this year, and that
its cash value will be $50, 900, 900. This
will be the largest yield since 1889,
when PA, 200, 900 bushels We're har-
vested. The crop that year Melted the
farmers s51.OO0.0 900.
The bluebottle fly discharges not
unimportant duty as a natural scaven-
ger Its larvae of maggots must devour
large quantities of putrefying and de-
caying matter, and must therefore re-
move from the earth's surface much
material offensive, if not disease pro-
ducing, in its tendencies.
The carpenter bee lays her eggs in
a hole she bores in suitable wood. As
the eggs are placed in several cells and
the la Dor requires many days the grub
in the lowest cell is Matched first, and
q way for his escape without injuring
the rest is provided by means of a back
door entrance to the long gallery.
"A projected canal from Marseilles
TO the valley of the Rhone is attracting
the attention of French engineers, and
they are at present engaged in seeking
an outlet on the Mediterranean coast.
This scheme would place port which
absorbs one-third of French commerce
in communication with the canal and
river systems of the continent.-N. y.
Engineering News.
"A chemist computes that at the
present market value the average hui
man cadaver contains something like
SIS, 600 worth of calcium. But, like the
fla bulous values of aluminium in clay,
or of gold in sea water the cost of ex-
traction at present prevents all profit
to the would-be enterprising manufac-
turerS, and the schools OF anatomy will
have no immediate cause for alarm as
regards commercial competition.
At the north pole there is only one
direction-South. One could go south
in as many ways as there are points on
the compass card, but every one of
these ways is south. East and west
have vanished. The hour of the day
at the pole is paradoxical conception.
for that point is the meeting place of
every meridian, and the time of all
holds good, so that it is any hour one
cares to mention. Unpunctuality is
hence impossible-but the question
grows complex and its practical sole-
ton concerns few.
Trout will not thrive-indeed. will
not live in ponds where the tempera-
ture of the water gets as high as - de-
grees. That degree is reached in sum-
mer in many of the trout ponds in
Connecticut that have been made with
great care and at some expense, and
the owners have been puzzled to ac-
count for the failure of the trout. A
temperature of 50 degrees does very
well for a trout, but he can't stand the
tepid water of summer in even the
clearest and most carefully made artif-
cial pond where the temperature of
the water reaches IS degrees
in the whole German empire on
May last there We're 27.540 miles Of
railroad. of which 5. 40S had a double
track, y miles three tracks and 80
miles four tracks. The length of mar
row gauge lines was 7Ss miles. The
increase since April l. 1892 rs months),
had been 437 miles, b miles of it mar
row gauge. OF the whole mileage only
,, S94 miles noj4 per cent?, was worked
by companies, though POS miles more.
worked by governments, was owned by
them. Besides the above. open to pub
lie traffic, there are l,294 miles of rail
road in the empire in mines. factories,
yards, etc, not serving as common
carriers and of this 39S miles is narrow
gauge. N. V Railroad Gazette.