Democratic Northwest. [volume] (Napoleon, Ohio) 1869-1894, 1889-06-13
SCIENTIFIC AND INDUSTRIAL


fever.
Iron railroad ties have been tried in this
country and given up.
California roofing slate is said to be
the finest in the world.
A new industry is the manufacture OF
ink from the oil and grease extracted
from spent cotton waste.
The Chinese laundrymen at Pittsburg,
Penn, bleach their washes with chloride
Of lime, and the garments soon rot away.
An English firm has just brought out
a new sensitive flame burner, which can
be extinguished entirely by loud noise.
A new process of hardening plaster of
paris has been discovered whereby it can
be adapted to the construction of floor
ing in place of wood.
A French scientist of the name of
d'Assier declares that the earth is gradu-
ally getting colder, and that the severest
period will be reached in the year II, $50.
White lead is manufactured by the new
Hannay method direct from the ore in the
space of a few hours, while by the old
process it was matter of several months.
The new Hengst powder made from
straw is said to be smokeless, fameless,
practically non-fouli-g and non-heating,
and being granular, is not liable to pack.
Pulu, the vegetable silk" used by up
holsterers for fine cushions and so on,
looks like brown thistle down and grows
upon the leaves and stalks of a tropical
fern.
At the German surgical congress, which
recently met at Berlin, more than one in
stance was shown of the entire removal
Of the larnyx and subsequent ability tc
speak.
Electricity for the cure of consumption
has attracted much attention of late years,
either for generating ozone for inhalation
or for its influence ON the vasomoters as
current or as static electricity in baths
Water glass, which is simply glass with
such excess of alkali that it dissolves in
boiling water, is one of the most valua'
BILE substances for fire proofng both wooo
and cloth, and much used in the arts as q
vehicle for mineral paints.
Somebody has discovered that peacf
stones can be used as fuel, and now they
command Sc ton in California. A sack
of stones weighing eighty pounds viii
last as long as an equal weight of Goa
and give greater intensity of heat.
The ultimate extension of wrought iror
is one-six -hundredth part of its length
The working strain is from one-sixth tx
one fourth the main strength. Resistance
to fexure acting evenly over the surface
equals one-half the tensile strength.
The British gunboat Sandfy, while under
| going experiments to determine the amoun
of water required to make up for wastagt
on a six-hour run at the most economics
rate of speed, consumed coal at the rat
of q "a pounds per horse power per hour
If you add Is to the pressure pc
square inch in pounds on a given boiler
and divide this sum by Is and then multi
ply the quotient by "a, the resulting
product will be the number Of gallons o
water required by that boiler per horse
power per hour.
The surface of the moon is exposes
during its long cloudless day of SOM
$50 hours to the direct rays of the sun
which shines upon it with tierceness ia
beyond anything experienced on tn
earth, and afterward it became almos
immeasurably cold from its night of SINH
lar period.