Mysteries of Nature and Science
Earth's Gravitation Draws a3 Rapidly as It Does One
that is Merely Dropped -How to Calculate the Height of
Projectile.
0
Two Coming Women Tennis Players
0
Six-Cylinder
Living
1
s
Bj GARUETT P. SEUYISS.
' '1 find myself totally unable to prove
the (olio wine proposition to a la-man.
A cannon, at an elevation, . from the
ground, fire a projectile, A, in a hori
zontal direction. At
the iiutant of dla-'
"harr a shell. B.
I dropped from
the iam elevation.
1 claim that the
two shell reach
the exeunt at the
hs me time. Sev
eral of my friend
disagree with me,
and claim that B
reaches the around
before A Leon A.
Kaufman, -New
City." .
Tou are right.
rtiippottlnr perfect horlzontality of the
ground, and neglecting any difference -of
effect 'from atmospheric resistance, the
two shells .would, strike the earth at tho
same Instant. . Assume the height to bo
about sixteen feet -(more accurately 16.09
feet): then both shells' would reach the
ground in "one second after starting. If
you stood beside the mouth of the can
non, aad dropped one. of .the shell at the
Instant that the other waa fired, they
would both touch the groupd simultane
ously at the end of one second, although
they might, at that instant, be half a
mile apart. In a horisontal direction.
If the speed of the shell fired from the
cfcanon were made no great that Its
V course always remained tangent to the
li'urvature of the earth, then it would
never touch the ground, but, neglecting
atmospheric resistance, would become a
satellite of the earth, traveling round It
In a circle. The speed necessary for this
purpose would be about five miles per
second.
The shell flying At that speed would
rttlll fall toward the earth's center exactly
a If It had been dropped from rest,
but It could not reach the ground be
cause the surface of the earth rounds off
sixteen feet In about five miles, so that
the shell would be Just as high above it
at the end of the first second of Its
-yflhrht as at the beginning. In two sec
onds the shell would drop sixty-four feet,
but the earth would round off by the
same amount, and so on.
The reason why both shells drop at
:lie same speed toward the earth when
one is simply allowed to fall while the
other Is fired horizontally out of a can
non i because the attraction of gravlta
Jon, by which bodice are forced toward
the center of tho earth, act both con-
Bead It Here See
xftboduciiii .
EARLE WILLIAMS
aa Tommy Barclay
ANITA STEWART
mm The oodaee
' Written by
; Gouverneur Morris
(Ome mt taa Host aTotabla -rigor
la iatHtH Utaratture)
Ttramstl d Into a. Fhote-PU.v
by
OsTasVr.aM W. OODSASS.
Author of
Peril mt Faoliaa"
Ta arxplott of
(Copyright, 191B, by Star Company.)
FIRST . EPISODE.
Ftnaly -Sturtevant looked hi friend and
master la the face and said: "Well,
vhat' the anw'er?"
. "I think," said Barclay, "that, I nave
devised a remedy which shall serve us
all. Mr. Btilliter."
,' Aa Prof. etIUUer advanced, Mr. Bar
clay said to the others: "The world'
greatest psychologist.
i"Yora do not have to tell us that." &id
Semmea, and they bowed to the profea
aor. "WU," aid Barclay, "let hav a look
at her.- - .
Prof . ' StllUter drew from his pocket a
folded picture frame of red leather. When
be gentlemen had exan.lned the phot
graphs, with an evidence of pleasure not
to be mistaken, for the good look of the
Amesbury and their daughter, were a
certain and sudden In their effect upon
the eye a I the beauty of the Yosemlte
valley.
"But." said Sturtevant, "what is the
remedy?"
For answer Barclay sanply touched the
'Photograph of the llttn Amesbury glr
with the tip of, his finger.
"She is the answer," he said, "but,
by the way, Ptillter, what do you hear of
the mother."
Prof. Btilliter shrugged his shoulder
very slightly.
"Dead?"
"Dying."
Barclay was not unmoved. "8be thinks,"
he aald, "that h is only dying In grief.
A a matter of fact, th ia taking a
great place in the march of events."
What are the child habits?"
"gh ha a nap." ald Prof. StUUter,
"from 10 to 10:30 and from to 30. At
other time she Is mostly out of door
with her nurse. Than I a wood back
of the house, In which she ha a play
house, a see-saw, etc. if you wished to
see per It would be a simple matter, but
I am ready to tsake my reputation on
her. Hie I absolutely cut to our plan."
'Wtik.'' aald Hemmes, "1 M lit I
complete mystery to Hturtevant and my.
elf."
In plt of Prof. HtUliter' guarantee,
the triumvirate, a thy were both popu
larly and unpopularly called, determined
i tlnuously and 'Instantaneously. The mo-
inent the shell leaves the cannon, and Is
thus deprived of support from beneath.
i in-pniis hi iuji, rxuruy ns n wouiu uu
If It were not being driven forward hor
lsontally by the exploitive force of the
powder. Its forward motion ha not the
slightest effect on the downward motion
produced by the eartVs gravity.
Nothing can shake off. destroy of
, ellmlnat- the latter. If you should nhoot
i the shell vertically upward gravitation
would cut off. during the first second
J sixteen feet from the height that It would
otherwise attain, 114 feet during the first
i threo Reconds, and so on.
This enables us to calculate how high
a shell, fired ttraieht upward with any
given vcloc'ty at startlnn, will ascend.
So constant Is the restraining force of
gravitation upon a projectile that the
mat hewn thai formula to be applied In
mnklni; siieh a calculation U precisely
tho same that would be used to det rmlne
the distance that a boly must fall In
order to generate tho ame velocity aa
that with which the shell stirta upward.
' This moans that the shell will -continue
to rise only for the length of time re
qulrvd by gmvlty to destroy It motion.
The formula may be put In this frtrm:
The velocity equals eight times the equare
root of the height. Thin Is derived from
the ordinary formula- V2 t O 8.
Assume that the velocity of the shell on
leaving the cannon's mouth is 3,400 feet
per second, directly upward.' By the for
mula, 2,400 divided by 8, of 9W, equals
the square root of the height. The height
Itself, then, must equal the square of
300, which Is 90,000, expressed In feet,
equivalent to a little more than 17 mile.
At that height the shell will ceae to
ascend and begin to fall back, acquiring,
at the end of the fall, the same velocity,
1,400 feet per second, with which It
started under the Impulsion of the ex
ploding powder. What gravitation has
dona Is, first, to destroy the upward mo
tion of the flying projectile, and second,
to impart to the arrested projectile the
same speed of descent that it had of
ascent
It I important to note that all of
these calculations purposely neglect the
effect of the resistance of the air. Air
resistance would bring the projectile to
rest sooner, and diminish the height of
It ascent. The amount of this resistance
depends upon a large number of variable
circumstances', and ha to be determined
by experiment, but It ha been so suc
cessfully studied that the science of gun
nery, as tho present war demonstrate,
has attained a very high degree of ac
curacy. It at the Movies
tMl J -J". TsJ "rM
' rrn: '
Ito. have a look at the little Amesbury
girl for themseves. In a car driven so
i swiftly that the traffic cop had to look
' the other way so os not to get 'dust In
their eyes. It did not take them long to
; reach the Amesbury house. They did
not, however, draw up before the house
itself, but in the wood back of it. Here
decked out In Indian dress so that h
resembled the ornamental aid of a cent,
Victrola
Oak
The following Omaha and Council
Bluffs dealers carry complete lines
of Victor Victrolas, and all the late
Victor Records as fast as issued.
You are cordially invited to inspect
the stocks at any of these estab
lishments. .
Sehmoller & lee
PIANO COMPANY
1311-1313 Farnam St
Hear the Newest Iterorda
rlnund-Proof .Demonstrating
$k! Cyck Co.
V 1
MISS BJT.TUrrEDT (LEFT) W
they found the object of ' their search.'
It waa no difficult ask for three such
men to lull any suspicion that the child'
nurse may have had. They compli
mented her upon the health and good
manner of her l'ttle charge, inquired
after her mistress and learned . with
every aemblance of regret that the latter
waa lnklng hourly. They joked Prof,
VI, $25
Omaha. Neb.
in Our Xewly Remodeled
Hoomi on tha Main Moor.
Branch at
334 BROADWAY
Council Bluffs
Her
PIN AT. 8 FOR TWO TENNIS TTTUB,
Btilliter a Utile on the fear with which he
seemed to Inspire the child. But to
Stllllter, looking far ahead, perhap this
aversion seemed a serious thing.
"Well" he said brusquely, "am I HghtT
I she the finest child you ever saw, or
Isn't sheT Just see the breadth of her
skull above the ears 7" -
He would have touched her, but she
V 1OTOU
established on a basis of ;
wings actaaly accomplished.
Victrolas Sold by
A. HOSPE- C0.9
1513-15 Douglas Street. Omaha, and
407 West Broadway, - Council Bluffs, Ia.
Talking Machine Dopartmont
in tho Pompoian Room
OPPOSING MRS. WAIXACH (RIOHD
shrank from him. When Barclay, how
ever, spoke to her she showed neither
fear nor aversion, only a pleasant shy
ness. "I have never seen you before,' he
aid, "but I am very fond of little girls,
and since I have none of my own I do
not propose to lose sight of you In a
hurry."
It brings to you the su
perb art of the world's
greatest singers and mu
sicians. There are Victors and
Victrolas in great vari
ety of styles from $10
to $250-at all Victor
dealers.
Victor Talking M&cLine Co.
Camden, N. J.
FOR "MET," CHAMPIONSHIP.
Leaving the others, he took the child
and the nurse for a little drive In the
car, and whea they had oome back he
slipped something that Jingled Into the
nurse' hand so that the flighty woman
felt prepared to go through fire with
b'-m.
, (To Be Conlnued Tomorrow.)
VctroUXVI.$200
. Mahogany or. oak'
By nEATIUCE FAIRFAX.
The , (ret f r excitement Is a dan
remus an appetite as the craving for
stronser liquor. The longing for rayety,
for nintmcmcnt, for the stimulation of .
bright llphts and gl-lrty throng is the
(lire-1 cause Tor the downfall or a dis
heartenlngly large number of boy and
girls.
Kadi wevk brings me numerous letters
from loya nnd girls who are on the
veiee of leaving hmie because their par
ents denv them the ftredom and social
opportunity they think their youthful
due.
nce youth tastes tlic strong wine of
tt!flial gsyety It lonirs to Sip again.
M first curiosity impels then a taste l
cultivated, and then the strength of
habit and i-ustom steps In. Youth doe
not !noMr enough to discriminate Youth,
elated at It eurees and popularity, do
not see the wisdom of early departure
and healthful ,tng hours of !eep. l'nr
ents know how hideously the longing
for Innocent amusement deter'orates Into
the wild 'raving for amusement of any
kind.
The drug liuliU t not formed tiver
night. It claims 111 victims by 'cw
htaae And Its lMlms are rot fore
nrdnlned outensts from homes of povertv
nnd hereditary decredatlnn. Tl ey arc all
too often men and women who were
nneo an sire, ,is decent. Or law abiding
aa you nnd 1.
Bo with aty appetite that masters you.
Orugs, drink, the .ravinn for plea:uir
sll no hand In hard alt produce the
same dreadful effeots.
A trusted employe Just 'sent to prison
for robbing the employer who was nl
his friend, confessed that his own full
was duo to longing for gsyety at any
price. lie sums up hi fall In these
words: "The tiUht life of New York
completed my downfall. I began U
drink. Then cam fnt company. Hut
my love for my wife and bahio never
died. It was. merely that, the luro of
liquor and tho six-cylinder life of Broad
way was stronger."
The aolltty to find pleasure in kind
ness anl friendship and the big, whole
some out door and work well done and
duty well performed and the love of
beauty la a Ocd-glven gift. Hunt for a
spaik of It In your own nature and rul
tfvato It aa a talisman against the fever
phantom of unrest that pursue ar(d
deatroys youth and conscience today.
Advice to Lovelorn
? lumoa PAOaVAX 1 M
The Weddla.
ter Mis Fairfax: I am a young man
about to be married and several question
have arisen upon which I would, be
pleased to hav you enlighten me.
What expense of a marriage Is born
by the bride and what expense by the
bridegroom?
The question ha been put to m that
the bridegroom should pay for the ball
and the bride for the supper only.
if a reception U given to the friend
la It proper for the bride and br degroom
to leave the reception before It 1 over?
Jn many Instance brides and bride
groom do. C. I. P-rooklyn.
. The bride, or parents of th bride, bear
all the expense of the wedding festivi
ties. The bridegroom merely send the
bride her flower aad give hi usher
and best man . remembrances.
The bride and bridegroom Invariably
leave, before the reception I over, and
the guest consider . seeing the happy
couple start off a part of their pleasure
In tn evening.
gireait
