Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1910-11-11
SCIENTIFIC MISCELLANY.

In the aeroplane Of Fau Regnard,
French engineer, the gyroscope Is APP
piled Indirectly to give automatic
stability. The Hy-whecl Is mounted in
4 gimbal frame and an electric bait
terry Of eight or ten cells keeps It In
motion IN horizontal plane at tho
rate of about 10000 revolutions per
minute. AS the aeroplane Is tipped,
the gyroscopc continues to rotate in
tho horizontal plane. The vertical
shaft, however, makes one Of four
electrical contacts. and this sets in
operation the righting mechanism
two of the contacts controlling the
longitudinal balance and two the
lateral balance. The action promptly
restores the machine to It's normal
position A gust of wind. for example,
may incline the front of the aeroplane
downward but the prompt closing of
the electric circuit, tips the rear wings
forward, and equilibrium Is recovered.
Two. ozone Understanding plants at.
Nice supply 40 and so gallons of
absolutely gcrm-frce water per second.
The ozone generator Is of copper
plates, with glass shsets between, and
the air between the plates Is dncom-
posed by silent electric discharge
ucts being removed by filter. the
ozone Is passed into n chamber into
which the water falls as rain through
gravel-covcred netting.
A novel use has been found for the
famous speech records of the Vienna
Academy of Sciences. This great col
lection of phonograms was designed
to preserve the spoken languages OF
all lands, with the idioms and varia-
tions of dialect. but on masnifying
sections OF records 1000 times. addi-
tional value was brought out in new
light on the theory of sound The
"a" of the human voice was shown
to bc differently formed from that of
the frogs croak. while new revela-
lions are expected from the study of
the voice In disease and OF minute
variations of dialect.
That the method Of taking food. as
we'll as the food itself, has Il great
effect on the teeth has been pointed
out by DR.. y. Sim Wallace in a paper
TO British dentists. Dental carries re-
suit from the action Of bacteria that
rapidly multiply in starch. sugar and
other fermentnble carbohydrates in
contact with the teeth. and the dentist
may divide food into two classcs--one
tending TO leave viscous and fcrment-
able carbohydrates about the teeth,
and the other acting to brush them
away. This suggests that food may
be so chosen and eaten as to prevent
teeth decay. Each meal should have
sufficient hard food to stimulate mas
tication. with It's excellent effect on
gums, jaws. teeth and aimentary
canal generally, and should end with
some article tending to remove the
sticky carbohydrates from teeth and
mouth. The pap-feedinS of children
is to be condemned. 1t Is suggested
that for breakfast fish. bacon. toast,
butter. coffee and tea should take the
place of the customary milk. porridge.
bread and marmalade: and that other
meals should have n large promotion
OF hard foods.
The new bean described by Aug.
Chevalier grows underground to the
size Of n very small pea in small
region of central Dahomey, western
Africa. 1t proves to be a species of
Voandzeia, genus hitherto repre-
scented by only one species, which pros
duces sngle-secdcd underground pods,
both pod and seed being edible. and
Is cultivated in Brazil and Surinam as
we'll as over much of Africa. The
new species has been grown and sold
locally under the name of dol" The
pod produced at the root of the plant
has the form of small American
peanut and hns but one or two seeds.
usually white, though sometimes
black. red or variegated. They have
an agreeable taste.
Hardened steel dies are produced
by electrolytic etching in a recently
patented German process. a die
block of hard steel is first made, and
this is placed in contact with Il plaster
of Paris reverse model made conduct
ing by saturation with sal ammoniac.
With the special dynamo. with capa-
city of 30 amperes at ! to Is volts.