Iron County register. [volume] (Ironton, Iron County, Mo.) 1867-1965, 1882-12-07
SCIENCE AND INDUSTRY

= A steam tricycle. enabling the rider
to travel at from fifteen to twenty miles
an hour, with very little labor, has been
invented by Frenchman. .a
regarded, mica is made
of silica, alumina, and potash. Silica is
one of the hardest substances in nature,
known in its purest and most beautiful
form as rock crystal. .-f ,.. '9q.
--Horseshoes made of three thick
nesses of green rawhide compressed in
a steel mold are used to some extent
in England. They weigh about quar-
ter as much as an iron shoe, and are
said to wear longer.-N. Y. Herald.
There is eminent medical authority,
says the Boston Journal of Chemistry,
for the statement that unripe or very
old potatoes contain a certain quantity
of solanine. This may produce serious
results if the potatoes are boiled with
their skins on, and if they are eaten in
large quantities. 81 -. .JasE ......." -.-
2 The blacksmith shop of the Pitts
burgh, Fort Wayne & Chicago Railway,
at Pittsburgh has been much troubled
by the unsettling of the brick FORCES by
the jar of steam hammers. Necessity
has, however, proved the mother of IN
vention. FORCES of asbestos paper have
proved decidedly successful method
of overcoming all difficulties.
One by one the more precious met
ais are found deposited in this country,
and in some cases, as in nickel, the I'M
suspected supplies prove greater in vol
ume than the previous yield of all other
countries combined. The latest of these
discoveries is that of vanadium, which
has been taken from an Arizona mine in
larger paying quantities than ever be-
fore known.-San francisco Chronicle.
Experiments have been made with
steam engines in France which show
that many of the bricks employed in
building furnaces are so porous as to al
low an easy passage for the air. In
consequence of these experiments, it is
recommended that no bricks should be
employed for the purpose which are not
very compact and refractory, and that
they should also be either glazed upon
the outside or covered with an impen-
etrable varnish. u -i''.~.' !i'i'''.t5 q rs
The Country Gentlemen calls atten-
ton to a paper read at the Montreal
meetingIof the Society for the Promo
ton of Agricultural Science, in which
Professor j. H. Comstock gave an &C
count of the efforts which have been
made, to destroy the scale insects, of
which so. many species infest our trees
and shrubs. .Lye and strong solutions
of soap appear to be the best remedial
agents, and the insects must be brought
into actual contact with the substance.
To expose them to poisonous fumes or
powders has no effect. =. 'la"a3 a. =
1t is generally known that copper is
employed to give bright green color to
some sorts of preserved vegetables. In
deed, when the subject came before the
Hygienic Congress in Paris, four years
ago, and the conclusion then reached
was that the presence of nine Milo
grammes of copper to n pound of veget
ables could be tolerated, it was said that
the common occurrence of the metal in
the blood and liver showed it to De
harmless in man in small quantities.
Still, it is not pleasant to rely on this us.
surance, and we are glad to learn that
other methods of maintaining the green
color of preserved vegetables without
resorting to polsons of any kind, or to
any extent, have lately been devised in
this country.-N. 7. Ledger.