Sacramento daily record-union. [volume] (Sacramento [Calif.]) 1875-1891, 1884-02-16
SCIERTIFC NOTES.

Sir Charles Wheatstone has shown that
fash of lightning lasts less than mill
ionth part of a second.
Professor William North Rice says that
the Connecticut river, between Northamp.
ton and Meriden, was once $50 feet deep
and Is miles broad.
The vibrations of machinery on upper
floors are said to be entirely stopped by
the introduction of piece of rubber be.
tween the base of the machine and the
floor.
A canoe cut out single massive oak
tree, in the stone age, has been found
partly imbedded under the River Arun, in
Sussex, Eng. 1t is 10 feet long by 4 feet
broad.
DR.. Laujorrois recommends potassium
dichromste for disinfecting cesspools, sew
age, dissecting-rooms, etc, and considers
it likely to be of great use in diseases due
to microbia.
Nature reports that Niaba, an isolated
mountain more than ;. 800 feet high, near
Bona, is slowly sinking into the bosom of
the earth. a deep ditch has been made
all around the engulfed mass.
To drill holes in glass, take a good steel
drill and wet with saturated solution Of
camphor in oil of turpentine. 1t is said
that holes may be rapidly drilled in this
way through the thickest plate. glass.
Clinker5 may be loozened from fire.
bricks by throwing into the box, when
very hot, two or three quarts of oyster or
clam shells, or less quantity Of salt, al
lowing the fire to 60 out and then cleave
off the clinkera.
A new kind of cloth is being made in
Lyons from the down of hens, ducks and
geese. Seven hundred and fifty grains of
feathers make one square metre of light
and very warm waterproof CLOTH which
can be dyed in all shades.
In hardening any article of steel that is
thin or light and heats quickly, it ia sd
visable to remove on a griudstone or emery
wheel the scale formed in forging be-
fore heating. The scale being of unequal
density, if it is not removed it is generally
impossible TO heat evenly besides, the de-
gree of heat can be better observed if it is
removed.
Fishes now living in the Suez Canal have
formed the subject OF paper b. Dr.. c.
Keller. Up to the beginning of the present
year eleven species from the Mediterranean
have penetrated the canal as far as Suez.
The Red sea- on the other hand gave no
fewer than twenty-five species, which, how.
ever, have only for the most part scarcely
reached half way toward the northern en-
trance.
DR.. Austin Meldon, of Dublin, has in
vented an electro motor, which is said to
create the largest amount of driving power
with the least expenditure OF electrical
energy, The armature is formed by join
ing together two fifteen-inch solid pulley
wheels with seven fiat bars of iron, each
bar being "a inches long by 3 inches wide
aud l.. inches thick, and the bars are laid
upon gut.a psrcha, copper bolts being used
to fasten them to the wheels. a shaft of
l 5-inch steel passes through the center,
and the whole is supported by hardwood
fran stayed with iron. Each side of
the frame where the shaft emerges
therefrom is supplied with an ivory
communion, the one on the right hay
ing three and the other four brushes,
each of which communicate with magnet.
Attached to the frame are seven electro
magnets. the three larger ones being made
OF , inch soft iron, and wound with No. IA
wire without bobbins, and the other four
of iuoh iron and wound with No. IL
wire. The total weight is q little over
taree hundred. weight.