Evening star., 1924-12-23

Q. How long has the John Dickson
Home been here and what are the re-
quiremcnts for admittancc?-M. L. e.
A. The John Dickson Home was of
ficially opened on January 1, 1919.
An inmate must have resided in
washington ave years prior to his
entering the home. He must be in
good health and over 65 years of age.
He must have been q useful citizen.
Business and professional men are
admitted.
Q. When was the Joaquin Miller
log cabin moved to Rock Creek Park
in Washington, d. C.?-H. S.
A. 1t was moved there in 1912.
Miller lived in this cabin for three
years previous to his return to Cali
fornia in 1885.
Q. How much motor oil and gas
were used by the world fyers?-
w. c. w.
A. Approximately 5000 gallons Of
Vacuum oil and 10000 gallons OF gas
oline were used in the around-the-
world flight.
Q. How many British thermal units
OF heat are there in one watt OF cleo
tricity?-W. H. c.
A. The Bureau Of Standards says
that one watt hour equals 3.411 Brit
ish thermal units.
O. Where is the thickest coal in
the world?-C. II.
A. The Bureau of Mines states that
the thlckest coal seam in the world
is the Fortuna mine, near Cologne.
which is 100 meters or $50 feet thick.
Tho thickest seam in the United
States Of high grade coal is the Nam
moth seam, near Wilkes Barre, Pa.
This seam is so feet thick, some folds
running as high as so to 80 feet.
Q. Does a radio horn improve the
sound?-N J.
A. The National Radio Institute
says that a radio horn does not i'm
prove the tone of a radio-it only
throws out the sound better. Nor
does radio horn increase the vol
ume of a radio.
Q. What can be used to remove the
residue of smokeless powder from a
gun barrel?-C. +. G.
A. The National Rifle Association
says that after the residue has been
allowed to remain and the barrel has
become pitted, nothing can be done to
remedy the condition. Rifles and pis-
tolls should be cleaned Immediately
after firing. II is best to swab the
barrel with warm water and dry care
fully. then apply a heavy grease to
prevent rust.
Q. How old is Mary Garden ?-I. H.
A. Mary Garden will be 4S years of
age February 20 next.
Q. How much does Niagara recede
each year?-K. C. T.
he re
the American Falls Is estimated at
between 0.2 and 1.6 feet per year. At
that rate 1t would take between
$4,000 and 15s.000 years to wear
away. The age of the falls is esti-
mated by geologists of the United
States Geological Survey as varying
between 10000 and $4,000 years.
Q. Describe a boomerang-w. L.
A. A boomerang is made from hard
wood in the green state and Is from
to feet long, formed TO a curve
which may vary from an arc of 90
to one of go, or there may be a dis
tinct angular bend in the arc. The
width is from 2k to 5 inches and
the thickness is about one-fourth inch
or less. The edges are finished sharp,
one surface is fiat and the other con-
vex, the greatest thickness being at
one-third of the width back from the
outer edge OF the curve. The ends or
wing" are warped over a bed of hot
Goals, and upon the degree and twist
of this warping depends the figure Of
flight which the boomerang will de-
scribe when thrown. All efforts by
the most skilled mechanics to initiate
the boomerang have failed. In throw
ing, the weapon is grasped by one
end, and by holding in a vertical po-