The sun. [volume] (New York [N.Y.]) 1833-1916, 1910-04-24
psOBLENS ron SUN READERS
S,Nl NSHERS 70 THS SLSrK
yI/SIE! NOT tIL RiGHT.

aafNrrN Nn0NmnE W4HAtAAB NoNN1l .
49, and 90 ls~asg Ana nsh1Hs prSa-
TEN "a Esea slaaasaSa - Chsrs-
4 ,..rs from the numhsr % answers
-, II that clock puzzle attracted morS
81, 10 than even the bridge problsm.
40. ere must 10 q g=eat many rradsrs
a.. ~rN Who think they know all about
a. strange % cay. thers n Svidsntly
az. -rls detail about the construction
a., ok that has escaped most of than.
,,,.r.i.., the number Of correct solutions
.ur.rd - still larger
d. of. ordinary clock. such a. that shown
III 90. pi,4ure printed two weeks ago. you
cam % rrl.h tho minute hand either hack-
u.ri 20 forward without carrying the
h,rr and NTH Il In its right proportion.
ha.,r.-., thr minute hand acts directly
:, ,-s hour hand through the train: hut
you ,,u pu,h tho hour hand about a.
r,u.- - you please without moving the
minute hand.
Ti.. ~. mute hAnd of clock has . square
lo.s .u the end which iiss over tho square
end 81 the stem that carries Il Just like q
monkey wrench. hut the hour hand 10
,ut.v a socket like the RerTuls OF q RnhinG
I'D md j. held in place by friction. whnn
the minute hand 10 not tight nc u may b
seeu 70 sag from oas side TO tho other a.
/, passss ~ and Q. making an error Of q
minute or two In the time every half hour.
but the hour hand 10 never subject 20 any
such Irregularities.
I, often happens that when you 10
IN und a clock one Of the hands h q bit
m the way Of the keyhole. II that hand
q pushed slightly 20 one side Co make
roon, for the key. and the peraon winding
the clock forgets 20 push IL hack into
rla-e again. either the time is changed
when the minute hand Ia pushed. OF the
hour hand 10 thrown out OF adjustment
nth the minute hand when the hour hand
= pushed.
That il what happened to the clock In
the picture. The hour hand was pushed
IN the space % minute and a half too far
and left there the last time the clock was
wound
One ~ the first essentials in solving a
problem 10 90 be sure that you under
sand the conditions. and in the state
ment of this problem two weeha ago
.olvers were warned that this differed from
The usual clock puzzle and were asked
~ -Jamine IL carefully. The question
Q we'll regulated clock in line with each
other but when win the hands Of the clock
shown IN this picture be In line AGAIN.
The correct solution IL 10 be found by
taxing the clock N Il stands and con-
EiernG that no matter where the hour
hand ought 20 b 81 n. the minute hand
will always travel twelve times a. fast.
o. that II the dial were divided into no
natter what number Of equAl parts the
minute hand would always cover twelve
Of them while the hour hand covered one.
A this il . gain Of eleven in every twelve
the two hands must be In line with each
other eleven times In every twelve hours.
and a. ons-elsvsnth Of twelve hours u
easily found. all that h necessary 70
solye the problem In to add this one
eleventh Of twelve hours 90 the time
marked by the minute hand. disregArdinR
the hour hand entirely except 20 note its
pnsition between Q and 10:
Tine shown .........s..s.............
lteryal- % y All
Tine required .................-.. 10 = 81 ali
II the two hands were in correct ad-
,usirnent Il would be impossible for them
% - IN line at either OF the times named.
= vet a number OF solvers gave the time
that the hands should 10 In line. a. II
some one were going 20 set the hour
hand n ght in the Interval. which was not
q condition Of the problem.
Several took the trouble 20 figure out
ne result by algebra. uaing the 30 de-
Ereee 81 circle instead Of minutes and
seconds Of time. Almost all OF them came
- the same erroneous conclusion arrived
a. Nv those who figured on q correct
ciock starting with tho assumption that
TIE hands were in line last at hours 10
m nutes u ell seconds and would be
% line again at 10 hours q minutes % I-il
seconds
SINE who are evidently quite un-
familiar With the interior arrangements OF
COCKS assumed that the hour hand was
!. sEo-edins the speed limit right along
s1i that the trick was TO figure out hOW
much more Roadway Il would get before
- 'wo hands were In line again. The
answer they got was nc 10 hours - minutes
D. seconds
One or two evidently did not look at
re problem a second time. but thinking
tfsv had grasped tn idea. sat down and
figured OUT the eleven periods OF time &C
WHICH tho two hands should he in hne
and then took the one after 10 O'Clock
a. t'eIr answer. These are tbs times:
p a q I'll
"A an Nn-Ia