Evening star. [volume] (Washington, D.C.) 1854-1972, 1930-06-14
ANSWERS TO QUESTIONS
BY FREDERIC J. HASKLN.

been omitted. If 10. the end stones
of the escapement wheel have been
omitted also. If the watch has only
Jewels, they usually consist Of
the escapement jewels, hole
jewels and 2 end stones for the bal
ance arbor.
@. Why does the pitch OF an auto
mobile horn rise as it approaches?--
r. D. K.
A. The Bureau of Standards saws
that the rise in pitch in an approach
ing source of sound is due to the fact
that the condensations and rarefac-
tions constituting the sound wave Are
spaced more closely together on &C
count of the motion of the source. The
reverse occurs as the source recedes.
@. What can be done with a photo
graph which Is turning yellow?-L. H.
should not fade. A photograph which
has turned yellow may often be copied
photographer with good results. The
fading is usually caused by improper
fixing and washing. To prevent further
change fix in hypo bath OF usual
strength for 10 to 20 minutes, and
wash in running water for one hour.
@. Please give the Florence Nightin-
gale Pledges. N.
A. II solemnly pledge myself befoye
God and in the presence of this as
sembly to pass my life in purity and
to practice my profession faithfully. I
will abstain from whatever is deleteri-
Gus and miSchievous, and will not take
or knowingly administer any harmful
drug. 1 will do all in my power to ele-
vate the standard of my profession and
will hold in confidence all personal
matters committed to my keeping, and
all family affairs coming to my knowl-
edge in the practice of my calling.
With loyalty will endeavor to aid the
physician in his work and devote my
self to the welfare Of those committed
to my care"
Q. Who is the Elijah of the New
Testament?-H. T. H.
A. John the Baptist has been re-
ferred to in this manner, owing TO the
fact that the events of his life were
similar to those recorded Of Elijah.
Q. What size mast has the Enter
prise?-C. D. r.
A. Americas cup defender, the Enter
prise, has a 16s-foot mast. She, as
well as all the other racers. has adopted
the Marconi rig, in which single
narrow mainsail tapers from the boom
to the tip of the mast without top
sail. The new type Of sail, installed
upon the giant masts, is expected to
give the racers exceptional speed. since
it is aerodynamically superior to any
that has been used before.
@. What are the qualifications for
becoming a driver on one OF the trans
continental busses?-R. L.
A. One of the large companies does
not accept boys under 81 or men over
40. Preference is given to high school
graduates. Generally about nine months,
elapse from the time a man applies
until he Is given a run as a regular
driver. The applicant undergoes two
physical examinations, one for general
fitness and the other by eye and ear
specialists. If he passes, he is enrolled
in the company's training school where
he receives a course in driving and one
in business routine. After that he makes
short runs and substitutes for drivers
until his trial period is completed and
he receives a full-time job.
Q. Is there a telephone book listing
subscribers in various countries?-G.
A. B. 1sg
A. In Denmark there has been pub
lished a world telephone directory list
ing the names of between fifty and sixty
thousand subscribers in many coun-
tries who make habitual use of inter
national telephone lines. There are
editions. in English, French and
German. -. E