Iowa County democrat. [volume] (Mineral Point, Wis.) 1877-1938, 1879-04-11
Popular Science.

Popular Science.
Prof.Siatba has devised and made pub.
lie process OF nickel-plating in the wet
way without the use of the battery, and is
said to give good results, and which is not
patented. The process is described rs
follows: To a dilute solution of chloride
of zinc 70 to 10 per cent. enough nickel
sulphate Is to be added to impart de-
cidedly green color to it, and the solu-
ton is then to be heated to boiling in a
porcelain vessel. The clouding Of the
liquid from the separation of a basic
zinc salt need not be needed, as it will
not interfere with the effectiveness of
the bath. The articles to be nickel.
coated-first carefully cleaned of oxide
or grease-are to be suspended in the
solution from thirty to sixty minutes,
the bath being kept at boiling temper.
ature. When the articles are observed
to be uniformly coated, they may be
removed. washed in water in which a
little chalk is suspended, dried, and
finally polished with chalk or other
suitable material. BY the substitution
of cobalt salt in the place of the nickel,
objects may be similarly coated with
cobalt.
The deepest mine in the world now
worked is said to be the Adalbert lead
and silver mine IN Austria, which is
$3.50 ft.deep. Thenext is the Vivers coal
mine in Belgium, 2,947 feet. 1t was
sunk to the depth of 1856 feet, but no
coal having been found, the working is
ut the former level. The deepest coal
mines in England are the Dunkirk col
lery in Lancashire, 1924 feet, and the
Rosebridge in the same locality, ,45S.
The deepest mine in this country is the
Yellow Jacket of the Comstock lode.
1t is now $500 feet below the surface at
the mouth of the main shaft, and 9 1913
feet below the Gould Il Curry crop
pings. The Savage stands second on
the list, and the Imperial the third,
both being nearly rs deep as the Vel
low Jacket.
Herr Won krupp, of Essen, has pa
tented an improvement in electric
lamps, which is intended to regulate the
position Of the carbons. Instead of the
usual clock-work u fan or fly revolves
IN quicksilver Or other liquid; other
parts consist of Il magnetic coil and
brake. These are so arranged that
when the carbons consume away, and
the magnetic current is weakened, the
brake releases u disk and the carbon
points approach each other. The whole
apparatus acts automatically. The
lamp thus devised has been employed
by Herr Won Krupp in portions Of his
great factory at Essen, in Germany, and
tue results have been 50 satisfactory
that the light is being extended to other
parts of the establishment.
As m agent for rapidly extinguisning
fires in chimneys, French chemist
recommends the burning of few
pounds of "carbon-de-sulphide on the
hearth. The combustion of this sub
stance produces large volumes of car
bonic and sulphurous-acid gases, both
OF which are eilectual extinguishers of
flame. The compound is said to have
been experimentally tried by the Paris
tiremen and with good results, since it
Is stated that within the space of three
months they succeeded by its use in ex-
tlnguishing two hundred and fifty-one
fires out of three hundred and nine
teen, and that without deranging or
damaging apartments in any way.
Intelligence has been received from
India OF an important geographical dis
covery. The course of the Sanpu, or
great river of Tibet, has been surveyed
by one OF the native explorers attached
to the Indian survey for II distance of
two hundred miles eastward of Chotang,
the furthest point to which it had
hitherto been traced in that direction.
IL then turned southwark into some
hills which the explorer was unable to
penetrate. This settles u verata quqstio
which has long exercised the minds Of
geographers rs to the identity of the
Sanpu and the Brahmaputra.