Evening star. [volume] (Washington, D.C.) 1854-1972, 1929-12-30

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@. What causes most Of the noise
which we hear when an airplane is up?
p. D.
A. The Air Corps says that the noise
made by an airplane in fight is caused
largely by the exhaust of the engine
and to q lesser degree by the propeller,
and by the passage of the air over the
wings and between the struts and wires.
Q. Are wild animals increasing in the
United States?-D. D.
A. A great many kinds are increasing.
Antelopes, black and brown bears, deer,
elk, mountain goats and mountain
sheep, and beavers, all show a steady
increase In numbers. The grizzly bear,
however, faces extinction.
Q. Is all or part of the human brain
the seat OF onsciousneSS?-A. C.
A. The cerebrum, or more narrowly
the gray matter Of the cerebrum, is
usually regarded as the seat of con-
seriousness.
Q: Where is the ocean the bluest2-
A. Authorities on oceanosraphy say
that the purest and deepest blue of the
ocean Is found in the Sargasso Sea, in
the South Atlantic, Indian, and Pacific
oceans. It has been found that these
parts OF the ocean contain very little
plankton, whose presence minimizeS the
transparency of the water and makes it
appear greener. The gulf stream is
also very blue. In the open ocean the
water is blush. Nearer the land 1t be-
comes green or gray. Within the thir-
tieth parallels north and south Of the
Equator, the color is brilliant ultra
marine, and south of latitude 80 degrees
1t changes to deep indigo, which con-
tinueS as far as the Antarctic Circle,
where 1t changes to an olive green. The
blue color is attributed to the rays of
light being unequally absorbed by the
water. Variations may also be due to
materials In suspension or solution.
Q. Where was the first social settle
ment in the world?-R. e.
A. The first social settlement in the
world was Toynbee Hall, which was
founded in 1884 by Canon Samuel A.
Barnett in Whitechapel, East London.
@. Is most food required by man,
woman or child?-C. S.
A. According to Prof. v. H. Mottram,
an adult woman needs but $500 Galleries
a day. An adult man engaged in Seden-
tary occupation requires 5000 Galleries
daily. A man doing hard work should
have 5000 Galleries. The physiological
reason given Is that the feminine or
ganism utilities food more economically
than man. A child's food should not
be proportioned according TO his age,
as he requires more than half the food
Of an adult. Boys and girls Of IA are
to be considered as adults in food
utilization.
@. What colonies has Denmark other
than Greenland?-E. B.
A. Greenland Is her only colony.
The greater part Of the island is un-
inhabited. It has a population Of !, 408
natives and 274 Europeans, practically
all Danes. The estimated area of
Greenland Is S45, 900 square miles, only
46,470 square miles Of which has in
habitants.