The mirror. (Stillwater, Minn.) 1894-1925, 1917-01-25

Q:-Can you please tell me what the popular vote was
that was given to Theodore Roosevel?-A. b.
A Roosevelt, (Repubcan received majority vote of
2545,575; his popular 1923 486 That of his near
est rival, Alton B. Parker (Democra), 5,O7791l
QWll you please tell me what meant by the length
OF sound waves?-E. Il. NJ.
A:-The length of sound embraces the distance
from the point of compression
point in the This depends upon pitch sound
ing body making hundred vibatona second, by the
time the hundredh vibration made wave from the
first vibration will have travelled about eleven hundred feet from
the starting point and the remaining nnetyeght will
lie between the first and hundedth consequence
this, the length for that particular sound will be
eleven feet the sounding body had made eleven hundred
braons second by the time the first
hundred feet there would have been
duced and the wave length for that sound would be foot
The lengths sounds produced
ally lay between and eight feet though singers
produced having lengths great eighteen feet
and Others have reached high
only about nine inches
When tuning fork struck produces sound so faint
that scarcely be heard unless the fork held the
but the end of the fork held box table, the sound
rings out loudly and seems from the table, The
PLANTATION of this very simple When only the fork vbrates
produces very small sound waves, because prongs
small and through the air. But when box
table, its vibrations communicated support and the
broader surface of the box table larger air
vibration, and amples the sound of the fork When
face used in this way reinforce the vibrations Of small
body and thus produce sound of greater volume
called sounding board Many musical instruments like the
violin and the piano. the intensity of their sounds
sounding boards which reinforce the vibrations of their strings
Columns of air, like sounding boards, reinforce
sound Unlike sounding boards however, they do
respond equally we'll large number of different sounds
They respond sound only several widely different
This may be shown follows: Take glass tube
about sixteen inches long, and inches in diameter and
thrusng end into vessel of water hold vibrating
tuning fork the other end By gradually lowering the
the point will be reached which the sound
loud and this point passed the sound gradu
ally dies again. By raising the tube again the sound
loud when tube reaches certain point This
shows that reinforce sound of certain vibration fire.
quency, column of in the tube be of certain
length.
Let us see why the produced by the tuning
reinforced only by column of air of certain length
When prongs of the fork make vibration Of air is
produced which the tube goes down the
ecd and comes back toward the fork Now If the reflected
wave fork the precise when has
peted onehaf of its vibration and about begin the
will strengthen the produced by the second
half vbaon but the reflected reaches the fork
after the beginning of the second half of the vbra
ton, will reinforce it, AT the downward of
the lower prong of the tuning fork of compression is
sent ube and is reflected the surface of the
In order reinforce the produced by the prong
upward the reflected reach the fork
just time that the prong reaches its normal position and
before it upon the second half of its vibration
only do columns of air tend to reinforce notes having
vibration but all elastic bodies have certain
rate they tend vbate and when sounds having the
produced them, these bodies will
vbrate sympathy with them If the sounds be kept long
enough sympathetic vibrations in objects them
times become great that they easily be Gobets
and tumbes made of thin glass show this property srk
ngy When the proper sounded the glasses take up
the vibrations, and give sound of the pitch. If
loud continued for time, the vibrations
glass sometimes becomes great that the glass breaks
Large buildings, and bridges aso have which they
vbra and this fact the foundation for the old say
ing, a may fiddle bridge down, if he 6ddes long
enough.