Amador ledger. (Jackson, Amador County, Calif.) 1875-19??, 1908-04-03

of the Body.-A Filter tor Mole
cules. - Nerve Fatigue. Insect
Chemists The Toxin of badness.
told Storage of Eggs. A Measure
for Smoke. -Forecasting Fishing.
An overlooked factory danger has
been pointed out in Germany by
Prof. NJ. M. Richter, who has found
that machinery especially in
dry air and when rubbed with resin
GUS substances may become highly
charged with electricity and may give
off sparks that in au atmosphere
laden with dust or combustible
vapors, may produce serious explos-
ion. A five-inch belt running over
wheel making 600 to 1000 revolutions
minute gave off spark l to l =
inches long. Coating the belts with
bronze or aluminium powder proved
an ineffective preventive, but acid
free glycerine, applied once a week,
attracted moisture, and not only gave
security against static charges but
increased the life of the leather.
A unique feature OF the geological
garden at Amsterdam is the insofar
ium, which. instead of the usual dead
insects pinned to boards, contains
living insects in glass cages with
plants and stones and other natural
surroundings. Over each cage is a
case showing dend specimens in the
various stages of development. Noe
turnal moths, the common insects Of
Holland, are given special attention;
but uther creatures are as interesting
and striking as those in collections
hued butterflies, the praying mantis,
"waIking sticks" and beetles in
varied array, not least among which
is the cocujo, so phospnorescent as to
shine in daylight.
The name "Hormones'' has been
applied to chemicals of the blood
bringing about coordination of
different organs. A substance of the
embryo mammal excites the NAM
mary glands of the mother through
the placenta, ensuring post-natal
nourishment; ''secretlne," carried
to liver and pancreas, arouses a secre-
tion of bile and pancreatic juice; and
adrenaline, from the supra-renal cap
sules, causes the contraction of all
vessels of the body.
The most powerful micro scope shows
objects about one hundred thousand
of an inch in size, but the ultra
microscope of SIedentopf and Zsig-
mondy has revealed PARTICLES not
more than one five millionth of an
inch in diameter, and DR.. Bechhold
declares that with stronger illumina-
| ton such as the more powerful sun
light on Mount Kllimanjaro in
Africa. we could unquestionably see
molecules. This German expert
menter has been Investigating the
extremely minute in another way.
By impregnating paper and fabrics
with Gelatine in a vacuum, he mas
made an ra-lilter, varying its line
ness by using different concentrations
of Jelly, and producing medium
apparatus with maximum pores OF
less than one II, 800, Goth OF an inch.
This just separated from blood the
haemoglobin, or red coloring matter,
and the serum albumen. The finest
filters extract PARTICLES too small to
be shown by the ultra microscope,
and smaller than the largest mole
cules, and it is believed that they
Will. be useful for eliminating dis
ease germs like those of EsmaIl-poX,
rabies and yellow fever. These Fare
some small magnitudes in mIllionths
of an inch. Human blood corpuscles.
300; bacillus Of splenic fever, 100 to
600; red, violet aud ultraviolet
waves, 27.6, l7.2 and 1872; albumen
moIeculo, GA; limit of ultra micro
scope, o.; finest ultrat filters, O.Oo;
alcohol molecule, 0O2; hydrogen
molecule, 0.OO64.
That nerves as we'll as muscles can
be fatlgued has bean recently demon
strated, although the contrary impress
sion had been general. At the
Heidelberg congress of physiology,
DR.. Burian showed by experiments
on cephalopods, that the motor nerve
may be excited so often that it be-
comes quite inert, and RECEIVERS activ-
ity only after ii long rest. The effect
is attributed to chemical reaction