Martinsburg herald. [volume] (Martinsburg, W. Va.) 1881-1920, 1892-08-06
POPULAR SCIENCE.
A steel rail lasts, with average wear,


A steel rail lasts, with average wear,
about eighteen years.
A cremated body leaves a residuum of
only eight ounces on an average.
German scientists are now making an
explosive equal to dynamite out Of com
mon jute.
A London firm finds windmill tho
most economical means of securing the
motive POWER necessary to run dynamo
Fatigue caused by brainwork. says an
Italian scientist, acts as poison, which
Affects an the organs, especially the mus
cular system.
Recent experiments in France on the
velocity Of propagation q electric waves
give mean velocity which is almost
exactly that of light.
Hard water contains too much lime.
stone, and that causes bread baked with
it to soon dry out. II you use soft water
to mix the dough YOU get much better
article of bread, and Que that will retain
its freshness.
Or. Lauder Brunton declares that cold
water is valuable stimulant to many Il
not all people. His own experience IL
that slipping half wineglass of cold
water will raise his pulse from seventy
six to over 100.
In distance the moon is 2iO, 900 miles
away from our Garth, around which she
gravitates like a satellite. Her diameter
is about 2153 miles; she has a solid SUI.
face Of Ia. 500, 600 miles, and a solid con-
tent Of about 10, 600 Of cubic miles
A German engineer concludes that IL
the speed instead Of the load Of freight
trains be increased from fourteen to
.twenty.eight miles per hour the expenses
per car mile at the higher speed would
be one-fourth less for repairs aud only
one.fiith more for fuel.
tits reported from England that form
OF ball-bearing has beea applied to the
spindles Of textile machinery, aud by its
use the high relative speeds have become
possible. From 5000 revolutions per
minute is the speed usually obtained. aud
1t is claimed that speed as high as IL, 900
can be reached.
On the subject Of the swoying OF lofty
chimneys 1t is declared to be absurd u
hold that chimney, say 400 feet high.
would sway sixteen inches. The slightest
vibration is felt wheu on a tall chimney,
and one inch and a half is thought to be-
about the extreme amount Of swayin
that takes place.
The deep-sea explorations that have
been conducted by the Austrian Goyern-
ment in the eastern part OF the Mediter-
ranoan show greater depths thaH any be-
fore recorded, and as a result the great
depression Of this sea must be shifted
considerably east from its former central
| position on the maps
10 sawmills using pneumatic pipes for
| taking away the sawdust it is found that
! the back of the saw usually throws up a
good deal of tiue dust in spite of the air
suction. This difficulty has now been
overcome in many instances by an iHven-
ton for admitting air in the saw hopper
in such a way as TO cause it to impingo
on the sides and teeth Of the saw aud
thus give it an air.bast washing.
If man weighing lGS pounds we're to
be transferred to the moon, the weight
Of his body, measured, at least, by tho
attraction which the moon would exercise
upon it, would be reduced TO about
twenty eight pounds. II his muscles aud
his frame remained the same It would
seem as il he would be able TO jump over
wall twelve feet high on the small
globe without any greater exertiou than
would be required to clear wall two
feet high on the earth.