The Manitowoc pilot. [volume] (Manitowoc, Wis.) 1859-1932, 1906-01-18

netallurgical expert, who has been eX-
aiming the mining and other re-
sources Of Canada, predicts that in
zen years the Dominion will have be-
come great metallurgical country,
having an iron industry larger than
that of any other country in the world.
SO, too, he thinks that within a decade
Canada will outstrip all other countries
N wheat growing. In Ontario and
Quebec there are immense deposits OF
magnetic, which have remained unde-
yeloped for lack of cheap fuel. The
invention of the electric smelling pro-
cess removes this obstacle, because in
the neighborhood of the ore deposits
water power is abundant.
The importation Of injurious birds
and mammals into tie United States
has been carefully guarded against
since the passage of the Lacy act ON
May %, 1900. In the five years end
ng June so, 1905, the authorities Is
sued 1891 permits for the entry OF
l,0O6,9 1854 birds Chiefly canaries), 2,Si6
mammals and thirty-elght reptiles, and
thirteen permits for the entry of 6,oOO
eggs of game birds. OF the consign-
ments 402 were inspected. No injurl-
ous animal Is known to have been adj
mitted, but seven mongooses, tifty-four
ding foxes or fruit-eating bats, one
kohlmeise, fifteen blaumeisen and two
starlinss have been refused entry. AT
Honolulu six keas were refused entry.
Statistics showing the enormous
waste Of energy involved in the pro-
duction Of artificial light are always
interesting, If for no other reason than
that they must continually stimulate
inventors in the search for better
methods. Sir James Dewar recently
presented these figures before the
Royal Institute Of Great Britain: In
an ordinary candle the total amount
Of energy transformed into light IS
only 2 per cent. Oil and gas lamps
are not more economical. The mean
descent electric lamp utilizes per
cent of the energy expended; the arc
light 10 per cent, and the magnesium
light Is per cent. Then comes the
glowworm and mocks us with its ~
per cent of expended energy turned
into light.
The possible value of radium to the
physician still remains chiefly a mat
ter Of conjecture. Two Italians. liz
.onl and Bongiovannl, have satisfied
themselves that it has an important
influence upon rabies, and that it may
act either upon the virus or directly
upon the bitten animal. When the
virus Is exposed for four to thirty six
hours to radium rays it is converted
into a powerful vaccine injections into
A rabbits eye overcoming the other
wise fatal effects Of NEGOTIATIONS with
dogs virus. With a powerful speci-
men of radium, the direct exposures
If several hours during six days, ami
mails inoculated forty-eight to one hun
lred hours before treatment were saw
I'd. while similarly inoculated animals
not treated all died.
1t is well known that pure quartz
glass possesses the property of trans
hitting, very abundantly, the socalled
chemical rays of light by means Of
which Photographic effects are produc-
I'd, and it has often been attempted to
make Photographic lenses Of quartz
alone. Unfortunately, quartz also pos
;esses the property of double refrac-
ton, so that, unless the opening of the
enses is very narrow, good images
are not produced. Recently a French
optician, f. NORM, has succeeded In
making small Photographic lenses OF
quartz glass in which some of the
difficulties have been avoided, and the
enses show great rapidity of action.
Still, the problem, confessedly, has not
been entirely solved, and the new
enses are recommended by their In
sentor only for special purposes. AS
ronomers are particularly DESTROYS to
obtain Photographic lenses possessing
the peculiar permeability to the actinlc
rays that haracterizes quartz.