Iowa County democrat. [volume] (Mineral Point, Wis.) 1877-1938, 1882-04-21
scINTnLATIoNs OF SCIENCE.

The smaller canals of Venice, Italy,
are to be filed up and converted into
streets.
The United States have seventy
three papers devoted to science and
mechanics.
1t is estimated that there are $4,000
square miles of heavy pine forests in
Florida.
Linseed oil added to the mortar is
said to prevent the saltpetring or
streakipg OF buildings.
According to Prof. simoni, the great
est depth of the Lake of Constance is
276 metres, and that of Lake Leman
800 metres.
A woman's institute of technical de-
sign has been started in New York. It
Is intended to give ample training In
such of the industrial arts as women
can follow with advantage.
Mexican mustang hniment is said to
consist of petroleum, ammonia and
brandy in the following proportions:
Petroleum, 1 quart; water of ammonia,
pint; brandy, l pint.
A German patent has been issued for
bottle made of twelve. per cent. sill
con, which Is said to resist the strongest
| acid. 1t is also recommended for the
iron plates of zinc and iron galvanic
batteries.
Ammonium picrate produces in So
buttons of gallo acid red coloration,
which iu a few seconds passes into a
fine green. Pyrogallic acid and tan
min also gives red, but it remains I'M
changed
A recent English patent is for the
selvedges of cotton velvets. Silk
threads are worked into the selvedges
of the cloth after dyeing, by sewing
machines, to produce an effect resem-
bling the selvedges of silk velvet"
The presence of chiccory, dandelion,
ETC., in coffee may be ascertained by
boiling with sodium carbonate, and
then treating with dilute bleaching
! powder solution, when the chiccory
and dandelion are bleached, the coffee
| being Enacted on.
India-ink drawings that are to be 81
ored or washed over with tints should
have little bichromate of potash add
ed to the ink. After the drawing has
been exposed to light for an hour or so
the lines can be gone over without
washing them up.
The Java process of shaving the bark
of the cinchona, which was introduced
into Darjeeling by DR.. King, has proved
a decided success. The bark renews
itself perfectly within about year,
and the trees do not appear to have suf-
fered the least check.
DIR. Ritthausen has obtained crystal
| Inc albumen from the press cake OF
hemp seed. Under the microscope it
appears in well-developed forms be-
longing to the regular system. SINH
lar albumens were obtained from the
press cakes of castor oil and sesame.
Sanitary lectures in Glasgow, Scot
land are stripped Of all technicalities,
and deal with sanitary matters in a
| plain, common sense way. When a
| lecture is delivered it is printed and
sold to the audience attending the next
lecture at the low price of 2 cents.
Sewer gas is di5infected in the hospi-
tai de la Pitie, at Paris, by nitrous OK
ide. The gas passes into an earthen
cylinder four feet high, filled with char
coal and sprinkled with nitro-sulphu-
ric acid, the moisture in the gas con-
denser setting free the nitrous oxide
contained in the acid, which destroys
the sulphuretted hydrogen and all
harmful matter.
A mode of manufacturing artificial
vanilla out of pine sap has been discov-
cred by German. The article from
| which the vanilla is made is known as
coniferin, and exists in all pines and
frs. The sap is scraped from the trees,
boiled and evaporated. 1t is then
filtered and pressed, and allowed to
dry. The residuum is the artificial va
nilla
To keep machinery from rusting take
one-half ounce of camphor, dissolve in
on pound of melted lard, take off the
scum and mix in as much fine black
lead as will give it an iron color. Clean
the machinery and smear with this mix.
ture. After twenty four hours rub clean
with soft linen cloth. 1t will keep
clean for months under ordinary cir
cumstances.