The Colfax chronicle., 1895-08-10
SCIENCE AND ihDustRY.


9-Knoblaugh proves that there is .
constant ratio between the intensity
of tn, fiuorescence and the existing
light, even when the intensity OF the
latter is altered in the ratio o. ! to
04OO.
j. Berkenbine, the iron ore expert,
estimates the production of iron ore in
1898 at 81, 900, 900 long tons, The total
production in this country last year
was II $40, Go long tons, against H.
5s7, 1920 in 1893. Twepty-four states
produce ore, Michigan standing first
Bangkok, in Siam, has more than
doubled it commerce in single year;
577 vessels entered and cleared in 1923,
as compared with 2s5 in 1892, while the
increase in tonnage was s77, $50 tons, or
1872 per cent The value of the imports
was sil, POS. 300 in gold and that of the
exports se2, 2s5.57O, mainly rice.
From the fact that the ammonia In
the air is the main cause of dried fow-
ers losing their colors, Herr Nienhaus
I concluded that the tendency might be
arrested by preserving the specimens
between sheets of paper which had
previously been saturated with solu-
tion of one per cent. of oxalic acid in
water. BY this method even the most
delicate-tinted poppies are found to re-
tain their colors.
1T is said that certain Swedish
copper mine has been worked without
interruption for 500 years. and Is, esti-
mated to have had total yield in
eight centuries of 1900, 900 TONS worth
lat the average value of e2s per tom
more than So. 900, 900. A record of its
production shows that the output was
1886 metric tons In 1858, reaching a
maximum OF 3,455 tons in 1850, and
slowly decreasing since 1890, being 27l
tons in 1891. ''1 +~*
M. Andres project for reaching the
north pole by balloon is being exam
ined by committee of, the French
academic des sciences. Four import
ant conditions must be satisfied: First,
an ascensional power of 6, 900 pounds,
to carry three observers, their instru-
ments, ballast and provisions for four
months; second, balloon, that shall
continue imperneable for four months;
third, conveniences for filing and
starting 1t in; the arctic regions, and,i
finally, some means of directing g it.
Nordenskjold thinks Andre can carry
out his plan. p 3
"A physician points ont that several
fallacies are common with regard to
the weight of the human body. The
man who congratulates himself on his
gain of several pounds in weight over
a given period may have no. cause for
rejoicing, for he may be under delu-
sion. Very few persons, says the IN
vestigator, have any correct idea of
their own weight. As matter of fact,
the weight of the body is continually
changing, owing to innumerable infiu-
ences. On a warm day after break
fast man win lose more than third
of pound per hour. Seventy per cent
of the body contains water, and its
weight varies constantly. The infer
ence to be drawn from the loss or gain
of pound or two may be mistrusted.l
Fluctuations of few ounces are a sign
that the body is in a healthy state.
-An expe Tilueut OI SOME ltupO tduCC
is reported, made with view to deter
mine, if possible. the origin of natural
gas, irrespective of theories hitherto
prevalent. For this purpose dried sea-
weed was STEPPED in water which had
been freed from air. and on the third
day gas appeared, continuing to be
evolved in Diminishing quantities until
the tenth day, when 800 cubic cent?
meters had been collected The evolu-
tion had evidently ceased, though after
standing two years and d half thirty
cubic centimeters e,of gascollected
in the apparatus; the second gas diff
fered from the frst, consisting, it is re-
corded, almost entirely of methane-
the chief constituent of natural gas
from which it isinferred that this slow
secondary.decomposition Of vegetable
matter has some relation to the origin
OF natural gas.-Boston Journal of
Commerce.