too, at such a time, and it is well to
see that the furnace has enough air
to burn the coal completely. The in
sidious thing about coal gas is that it
produces drowsiness very slowly, and
if the occupants of a house are asleep
when coal gas escapes, they may be
asphyxiated quite painlessly and in
sensibly in their sleep. In mines,
aboard ships, etc., canaries are often
kept because they keel over from the
first whiffs of coal gas, and so give
warning. Our Illuminating gas con
tains coal gas, and a bad-smelling gas
is added purposely just to give warn
ing of a leak.
Now what do you know about that?
Answers to Yesterday’s Questions.
1. The red rays of the spectrum
have the longest waves.
2. The violet waves of the spectrum
have the shortest waves.
3. Ultra-violet rays probably have
a color, .but our eyes are not sensitive
enough to detect what it may be.
4. Infra-red rays are those with
longer (lower! vibrations than red, and
hence like ultra-violet are invisible.
5. Leaves are green because they
absorb all the colors of sunlight except
green.
6. Black clothes are hot because
they absorb al the colors of sunlight.
(Copyright. 1926.)
Clues to Character
BY J. O. ABERNETHV.
He Longs for Authority.
The chap who likes to boss, to
domineer, to lord it over his fellows
either in business or social life will
be found to have a very broad,
square, projecting chin. This type
never is satisfied in any sort of
position where he must take orders
and he does not make a good employe
for that reason.
