Amador ledger. (Jackson, Amador County, Calif.) 1875-19??, 1910-03-04

Inc views Drought u Oul oSSS !"
nature are lighted by a mixture of many
kinds OF rays, together known as white
light, and by showing how some objects
appear under the illumination OF
single kind of rays-such as the intra-
red or ultraviolet-Prof r. W. Wood, OF
John Hopkins University, has opened
new field to our vision 1t is the in
visible ultraviolet rays reflected to us
that have revealed something on the
moon not hitherto seen. Such rays
affect the Photographic plate, and
pictures of the moon we're taken through |
thickly-silvered quartz lens, which
filtered out the visible rays, permitting
only the invisible ultraviolet to reach
the plate. Similar photographs were
taken through yellow screen. The ul-
traviolet pictures have the bright craters
quite as bright as the other pictures, but
they also bring out 3-shaped black de-
post near Aristarchus that seems never
to have been made perceptible by visible
light. To get an idea of the character
of this deposit, study is being made OF
he ultraviolet rays reflected from ig-
neous rocks, volcanic ejecta, and other
materials.
A"domestic electroplating process
that he sought ten years has been
brought to the notice of the London
Royal Society of Arts by Augustus
Rosenberg. The material evolved is a
powder that contains the metal to be de-
posted, with other ingredients that
make I'D an electrolyte on the addition
of water, and it is claimed that the ap-
| plication of the mixture with a
moistened rag or brush gives strongly
adherent deposit of substantial thick
ness. Prof. Sylvanus Thompson bore
testimony to having seen the process
used for nickel-plating without battery.
Sand-lme bricks, as used for some
years, seem to vary greatly in strength
and durability. In experiments reported
by J. e. Stead, mixture of about Is. 5
per cent of lime with 8. IS per cent of
sand, suitably compressed in moIds,
gave the maximum strength of over y,
900 pounds per square inch.
Radium and other RAYS having been
found TO affect the color of such stones
as the amethyst and the beryl. Paul Sac
redote has tested the action of various
rays upon the diamond, which has a
simpler chemical constitution and varies
greatly in value with Slight colo
changes. The specimens tried were
from different sources, some being
colorless and others slightly yellowish
Each diamond was submitted in turn to
the action OF the X-ray while outside
the tube, to that of the cathode rays
when placed within the tube, and finally
to the action of heat For the last ex-
pertinent an electrically heated mufle
was used, with thermometer showing
the temperature up to 300 deg. c. The
X-rays seemed to have no noticeable
effect, but the cathode rays changed the
white or light yellow to light brown,
which prolonged action gradually
deepened to dark brown. The artificial
colorlng thus given seems to be per-
manent, as the diamond lately shown
the Paris Academy had been kept with
out alienation for year, at times in
the light and even in strong sunlight.
Heat of 300 deg. to 400 deg. c. had a
declorizing effect, bringing back artifi-
cially colored diamonds to their original
colorlessness.
The increasing Importance of the
windmill suggests the need of records
for each locality showing the amount of
wind that can be expected each year at a
moderate height. A consular report
calls attention to a windmill-l4 feet in
diameter and IS feet above the ground
that is in operation in a peat-bog near
Dunfermlne, and is doing in less than
an hour work that formerly employed
four men an entire day of ten hours.
This windmill rarely, if ever, ceases
moving. 1t is found safe to say that, at
a height of 80 feet, a breeze of 10 to ISL
miles an hour can be depended upon
with reasonable certainty in any part of
Scotland except valleys and sheltered
spots, and the power offered is subtle
for pumping, saving, root-cutting, and
various kinds of farm work. With
electrical transmission, the range of
service can be indefinitely extended.
From 2497 earthquakes recorded in the
vicinity of the Austrian Alps from 1897
to 1907. DR.. V. Conrad finds tina
shocks are much more frequent in March