The Caldwell tribune. [volume] (Caldwell, Idaho Territory [Idaho]) 1883-1928, 1905-10-21
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About seventy specimens Of the ex-
tinct great aux are now preserved in
museums. A specimen recently sold
In London brought $1,000.
While astronomers have been taking
notes and discussing changes in the
aspect of the moon, NJ. Puiseaux, a !
Frencnman, has been looking up data.
Going over all records, from the earli-
est observations to the latest, ne con-
cludes that the reality Of the supposed
changes has not been proved, and that
the varying sentiveness OF the retina |
for faint objects is SUFFICIENT to nc
count for the difference seen, while
different conditions Of exposure might
explain all appearances in the photo
graphs. 5.
Some recently invented chronophoto-
graphic cameras by Lucien Bull, of
Paris, take successive pictures at rates
from 1000 to 1000 per second. The
source Of light is the spark of an In
duction coil, which, it is calculated,
endures only about one two-millionth
Of a second, so that with improved
mechanism, the successive images
could be taken at far more rapid
rate than ID now employed. Six hun
dred images per second, however,
suffice to show clearly the moving
wings Of dragon-hy, anu with LOO.
or 1900 images per second, sharp pic
lures have been obtained of bees and
house-tiies in fight.
Tho Scientific American calls atten-
ton to the danger attending the wear
ing Of adulterated leather. A large
amount Of cheap leather is weighted
SO that when the weight test is applied
such adulterated leather may pass rs
first-quality material. Leather SO treat
ed, however, has the peculiar quality
of absorbing moisture freely and re.
tanning 1t to an extreme degree. The
result is that shoe made Of this
chemically treated material Is In act
uality never dry. Even In the driest
weather the perspiration of the feet
is sufficient 10 render the footwear
dangerous, as such natural moisture
collects on the inner sole.
The secret wireless telephone Of A.
T. M. Johnson, retired Australian
official, depends upon steel. reeds tun-
ed in unison or octave to the voice Of
the person speaking, and, as voices
vary greatly, a special reed is neces-
sary for each person. On speaking
into an ordinary microphone, large
Ruhmkorf coil In circuit transmits the
vibrations, without connecting wire,
to the receiving apparatus. Messages
have been sent to distances of half q
mile. Secret kilograms can be sent
through similar tuned steel reeds, and
these are received by a secret bell ar
ranged to respond only to the vlDra.
lions from the proper transmitter.
During the present summer Mr.
Clayton, of the Blue Bill Observatory
Is cruising, with a steam yacht belong
ing to the French rneteorologist, Tells
serene de Bort, in the trade wind re-
gion Of the Atlantic Ocean, in order tc
sound, with the aid of kites and bal
looms, the air strata up to a height OF
} $1,000 feet. Among other things, he
will endeavor to reach the lofty south
west or return, trade wind, supposed
, to blow In the neighborhood Of the
Canar1es, the Azores and the Cape
! Verde Islands. This wind has actually
been observed only on the summit Of
the Peak of Teneriffe. An attempt
to reach it with kites from the Prince
of Monaco's yacht last summer wal
unsuccessful.
. In the novel method of electric weld
ing Of a Berlin firm, the heat applied
Is evolved by an electric arc formed
. between the working piece and car
bon electrode at the place where tn
weld Is to be made. A relatively small
electric generator Is used with a stor
age battery connected up in parallel
: and the carbon, fixed in the holder
Is readily shifted as desired. The grea
heat melts both the working piece an
? the metal to be welded insuring al
Intimate Juncture.' Welding materia
: Is supplied until the joint or apertur
1 Ia filled, and by gradually reducing tn
l arc the weld is cooled slowly. TIL
I process supplies especially cheap an
: simple means for making small repair
: in large castings.