The Princeton union. [volume] (Princeton, Minn.) 1876-1976, 1879-05-28
POPULAR SCIENCE.

POPULAR SCIENCE.
A SMALL quantity of salicylo acid is
found to stop termination altogether.
Picnic acid only suspends it.
DIR. HALEY says that the total evap-
Grafton caused by the rays of the sun
on the surface of the Mediterranean sea
amounts to 58,8OO,OOO, 900 tons of water
in one summer day. Y '
FROM the debris of the coal mines
France makes annually 100000 tons of
excellent fuel, and Belgium 100000
tons. In England, where there is not SO
much waste in coal mining, and where
coal is much cheaper, the manufacture
of artificial fuel is only about 100000
tons year. Germany makes fuel, for
the most part, from peat and similar
earths. 60 .... .-.
Pork differs from beef and mutton,
not in flavor only, but in the larger pro-
portion of fat to lean flesh. This is due
both to the nature of the animal, in its
tendency to store up fat, and to the habit
of so feeding and treating it that this
tendency may be fully developed. The
pig stores up in it's body three times more
Of it's food than the OK, and by SO much
is it more cheaply and quickly grown
NJ. GoPPERr says that no matter how
carefully writing has been obiterated,
enough traces Of the iron oxide Of the
ink will remain to appear in a photo
graph of the paper written. upon. The
light reflected from virgin paper acts
differently on Photographic materials
from that reflected from parts which
have formerly been. covered with ink,
even though the eye may not be able to
detect any difference. NJ. Goppert thinks
that the genuineness of q document may
always be tested by photography. i
VEaETABLEp psychologists used to think
that leaves absorbed dew and rain until
. Frenchman named DuchartIe, in 1867,
reversed this view, and his opinion was
adopted by botanists. Practical garden
ers, however, have never been convert
ed, and they freely syringe their plants
under certain conditions. And now the
Rev. Mr.. Denslow, in England, has, after
many experiments, concluded that dew
is not absorbed at night, but that alb
sorption takes place at sunrise, when
Transportation is begun, and the water on
the leaves is sucked in.
In his "True Law of Population,
Doubleday points out that Populations
are universally found thin in pastoral
countries where the food is chiefly ami
NAL; denser where it is mixed; still
denser where vegetable but plenteous
densest of all where it is vegetable anc
scarce" The natural inference is thai
in the plethoric state productiveness il
arrested, while in the deplethoric it il
reinvigorated. In the poorest time'
Irish families subsisting on potatoes ant
meal averaged seven, against five in En-
gland and three in France. In rice
eating countries the population is dense
| A PARIS physician has discovered
soporifc which he declares to be innoc
uous, and which has the virtue of bein.
imitable in the duration of it's effect
at ones pleasure. The time durin
which q given dose will operate can b
calculated to within ten minutes of tn
actual figure. Thus, a traveller with tw
hours and half's journey before hin
might feel perfectly safe in. taking
two hours dose, or even a two hour
and twenty minutes, though the las
might be a little dangerous. The ii
ventor, who, throughout his sexper
ments, had railway travelling in hi
mind, arranges the doses in miles" c
rather kilometres. OF course, it's con
position is secret. It has alread
been tried by number of the phys
clans patients, who allowed themselve
to be experimental on. They pr
nounce it agreeable to the taste, havin
something of the flavor of chartreus