Evening star., 1927-05-19

! @. Please give some information
about the attendance and the value
! of the physical effects belonging to
| the various fair associations. such
as buildings, roadways, race tracks,
| etc.--J. c. X.
A. The international Association
of Fairs has a membership of about
| 80 of the leading fairs of America
The valuation of the physical effects
of these fairs runs from $250.O00 to
| SO 600, 900 per plant and it is estimat-
ed that probably the average would
be somewhat near million dollars q
plant. The attendance annually runs
from about $4,000 to 100000, with
probably an average of 100000 per
fair. Then, in addition to this, there
are about 500 smaller fairs, the value
of which would be pretty hard to
estimate.
O. Can cacti be grown from seed
and, If so, how?-E. d.
A. A large proportion of the seed
is fertile. Plant in deep sod, mixed
with about so per cent sand. Provide
good drainage in the pots in which
the seed are first planted. Level the
surface of the soil carefully and dis
tribute the seed evenly. Cover with
a thin LAYER of soil. Keep the tenn
perature warm and uniform, 10 de-
grees being a good temperature.
When watering use a gentle spray III
order not to disturb the seeds. Trans
plant after three or four clusters OF
spines appear.
@. Please give q definition of per
petual motion f. 7.
A. Perpetual motion is the con-
I NJ M "a
| thetical machine perpetually supply
| ing it's own motive forces independ-
entity Of any action from without. The
Bureau of Standards says that per-
| petual motion is not possible accord
ing to any known physical law.
| O. Is the consumption Of cotton
| increasingly. o. F.
| A. The March consumption of cot
| ton, 694,1 bales, was a record figure.
| The total consumption for the eight
months ended March 81 was 4,7lS,680
bales, compared with 4.381 ,448 bales
for the corresponding period in 1926.
@. What is an imperfect chord of
B D F? What is an imperfect chord
in general?-A. G.
| A. Perfect chords are: The major
chords, consisting of prime, major
third and perfect fifth; the minor
! chords, consisting of prime. minor
| third and perfect fifth. All other
chords are classed as imperfect. The
| one especially mentioned is the dimin'
| ished triad, consisting of prime,
minor third and diminished fifth. and
is based on the seventh degree Of the
| major scale or the second in the minor
mode.
| Q. How steep are grades made on
railways nowadays?-J. B. S.
| A. Any grade of 2 per cent or
over is very uneconomical. Grade re-
| vision has progressed in this country
until there are few grades of 2 per
cent or over. The Denver & Rio
| Grande has II miles of "a per cent
grade westbound from Helper, Utah,
| to Kyune. Utah. and 2 per cent
| grade from Soldiers Summit, Utah. to
| Tucker, Utah, a distance of about Is
| miles.
@. How much did the Wacker
| Drive in Chicago cost?-G. B.
| A. The entire project was built at
cost of $22,000,000. OF this $780,
| 900 was the cost of construction, the
remainder being the cost of condem-
nation, etc. The total length of the
drive, from Michigan avenue to Mad
ison street, is $40 feet, the double
deck level being $500 feet in length.
The lower level is 135 feet wide from
the store fronts to the dock lines. The
upper level is 10 feet wide.
| @. How many languages are spok.
en- in Africa?-J. P.
| A. About 275 are known.
@. What is the age limit for play.