Amador ledger., 1907-04-26

of Air Navigation. Proof That
Elements Change. - Chairs for
Panics. s.-Goggles of Sheet Steel.
The loIg suspected evaporation of
metals and their solid compounds has
been recently shown by several
methods, that OF Zengelis being to
enclose the substance in an air-tight
glass vessel with piece of chemically
pure silver foil suspended horizontal
ly third of an inch or less above it.
Experiments have been made with
copper, lead, iron, zinc, non metals
Sulphur, seleinum, tellurium and
phosphorus), metailoids (arsenio and
antimony), and various oxides, hy-
drates, sulphides and haIoid and oxy-
gen salts. The silver foil was more
or less affected In nearly every case,
usually taking on golden tint. 10
produce a distinct effect required
weeks or months in most cases, but
few days or even hours we're sufficient
with some substances, metalloids and
n-metals acting more eDergetically
than metals. The results seem to
indicate some connection between
evaporation and the action of solid
bodies on Photographic plates. as we'll
as with radioactivlty.
The familiar mail-van is to dis
appear from Berlin streets if a new
plan of connecting the central post
office with the various stations in the
city is carried out. A tube of sutti-
cient size to permit STOPPING man
TO enter is to be constructed, and
this will have two railway tracks, one
above the other. Small two-w heeled
cars Will be run by electricity. No
locomotive or attendant on board
will be required, and trains contain
to any part of the city in fourth of
the present time.
The theory that the earth's crust Is
subject to diurnal movements analo-
gous to tides has been confirmed by
the seismograph at MaurItius. The
movements seem to depend upon the
sun. A wave of low barometrio pres
sure travels around the earth after
the sun, and this wave causes a bulge
in the crust beneath it.
Fused sodium peroxide, electrically
prepared, is the chemical agent in
process of air regeneration that has
been recommended for such purpose
as submarine boats, etc. In contact
with water, pure oxygen is given off,
caustic soda being formed. The soda
absorbs the carbonIc acid, coating the
peroxide with a crust of carbonate,
which is removed by shaking the
chemical in a wire net or gauze
cylinder. 1t is found that 334 ounces
of the peroxide give the seven gallons
of oxygen required by one man per
hour, and that 20 pounds should sus-
tain nine men in submarine of 200
cubic feet capacity for nine hours.
before the carbonic acid in the air
breathed would increase to a trou BILE
some quantity.
Experimenting on the influence of
small currents of electricity upon
those of acetyIene-
q. +. Lorenz has found that an alter
mating current of few hundIedths of
an ampere increases the light about
i've times, at the same time shorten
ing the flame. Before a mirror the
periodic changes are easily seen. The
flame, which gives out a humming
sound, can be used where a specially
white, short-wave light is required,
and it Is also applicable as a tele-
phone receiver, especially if it is
supplied through manometer mouth :
piece into which the voice is directed.
rhei electric current was passed
between the burner and a wire pro
Iecting into the dark cone of the
flame.
The aeIonautic school which has
been in existence for year at Puris
is to be followed by a similar one il
Germany, the training at first to con
sist of one years course in balloon
ing. The instruction will include
the calculation of volume of balloons
methods of cutting the material j;
methods of rendering the material
impermeable; construction of nets
gases used for imitation; the general
theory of balloon construction and
use; scientific instruments used in
ascensions; meteorological observa-
ton; ascents alone; ascents with
passengers; special instructions foI
passengers; methods of landing; ap.
plications with aiIships. Work with
aeIoplanes is to be added when these
machines are sufficiently developed.
The most direct evidence we have
of the disintegration of atoms is that
afforded by radium, and this is very
briefly summed up by Sir Oliver
Lodge. Rutherford measured the
l i n