Evening star., 1928-04-18

loss Of heat by bodies on the earth II
consequence OF radiation Is more thar
compensated by the amount received
directly or indirectly from the sun
AFTER sunset all such bodies begin Z
cool. The atmosphere cools YER.
slowly Therefore, the body which
colder than the air collects moisture
from the atmosphere by condensation
CLOUDS check the formation Of dew b.
obstructin9 radiation or restoring b.
counter-radiation some " the heat LOST
When the sky is wholly overcast, M
dew is formed. Neither Is any dew
formed beneath 80 open shed or shelter
though the C.ts. around may be 50
distinctly wet rs TO leave the form oi
the roof distinctly marked on the
ground. The deposition Of dew is un-
accompanied by the appearance Of an
visible mist Such mist appears wha1
the condensation takes place within
the body Of the air itself and fl tnen
called fog" IN t.Ie lower regions ana
cloud" in the higher.
@. How many degrees hot is a red
hot coal?--F. l..
A. The Bureau Of Standards SAYS
that the phrase red hot Is used pop
! ularly TO designate any temperature BE-
tween about TOO &. and 1000 G.
Above 1000 c. the phrase employed 70
describe an object would usually BE-
white hot although the color would
still be primarily red or reddish yellow.
A lump Of coal would first become Wis
| IDLY red at about 500 C. in very dark
room. although one would have 10 look
closely in order 20 see the light given
of al this temperature.
/ @. what Is a simple method Of de-
stroying small colonies Of lawn ants?-
/ A. In the case OF lawn ants where
| only small area with few nests is
/ concerned. drenching the nests with
/ boiling water or injecting a small guam
/ tity Of kerosene or coal oil viii b. ef-
| fective. and similar treatment viii sD-
| ply 70 nests between or beneath paw
/ ing stones. Another simple means Of
/ destroying such ants fn lawns of small
! extent Is 70 spray the lawns with ksro-
+ Sene emulsion or With a yerv strong
/ soap wash. prepared by diss0lgtng any
/ common laundry soap in water az the
/ rate Of from half pound 70 a pound
/ OF soap 10 tbs gallon Of water.
| @. How many parachutes we're pur-
} chased by the Navy in 1927? Are more
( needed?-E. S.
A. During the fiscal year 1927. 2I3
E POI o~AAA~S2 @c4E PIX GlA<1S-L U ~I4E HdfE y
/ About 1000 more are needed, but the
! limited appropriations did not permi.
| the fulfilling Of this need.
O. Are there breakwaters 70 protect
/ the Panama Canal?-C. z G.
/ A. Both entrances TO the canal are
I protected by breakwaters.
@. What is the largest non-naviEzbls
/ river IN the world7-E. P. w.
!, A The Platte River. with It's north
| ern fork which Is about 1850 miles IN
/ length, Is the longest nc1-nzv vigabLe
1 river IN the United States and perhaps
/ the longest in the world. The Orange
/ River IN South Africa, which Is LOO
/ miles long. is perhaps the next longest
non-navigzbie river in the world.
O. Should a young child be allowed
| 70 drink cold mlk9-E- c. V.
/ A. Authorities say that cold milk IS
| not suitable for young children. Il
should be warmed.
@ Are stainproof sinks on the
I market?-E c. T.
/ A. Porcelain enamel on iron has been
I improved recently so that now stain
/ proof sinks are ayaiIable-that is. ordi-
nary food stains and fruit acids VIII
not mar the glossy finish.
/ @. Was the Lords Supper a cere-
| mony the observance OF which was con-
/ rned 70 the Apostles and 10 Jewish
! Christians ?-S. W.
1 A The feast was also celebrated IL
/ the churches OF the Gentiies as for
! example, that az Corfnth