Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1906-07-11
.iI LEARN LAWS
Ne STUDY OBJECTS
s,IertIflo knowledge Of
"' so',od May be Gained by
observation.
:, VISIT WEATHER BUREAU.
candy Class at University TO be
N w by Or. Hyatt Di'
,,c,or Of signal station.

49, ,sure study class yesterday
- n L. Prof. Cummings SAID
8 w W ,hs child make the discovery
me great law in nature study
'n taught according 10 the best
%" :, ,be modern school. Thus
we ). child learns from experiments
NV ,,ond IS. he may be told some
a, open to ordinary obserya-
p.' N, sound does, He may be told
" =, sound waves Of the air (the
~ a,,o when the powder maya
:, Arsenal hill exploded years
Iha ~. most Of the windows In the
asp n this city; how the sound OF
h''ss s,sn voice often precipitates the
hs ns ne avalanche IN the Alps how
w s.,sS Of a pistol in a lighted room
lm .i s may put out the lamp OF cam
Tbess and other interesting phe-
" 80 should follow, not precede the
...,sie facts tpercepls) obtained
lo- observation.
LAWS or SOUND.
-b, laws OF sound. therefore are
49,. S,yeloped BY the use Of the PEN
,.'g,o showing the law Of its vibration
.-or5lng 10 its length. then 1t Is
- that an elastic steel spring free
!. ossellste is a pendulum that a vi
...,ine string is a pendulum, etc, that
~ greater the tension and the great
!, N, force Of gravity operating on
cannon pendulum the more rapid
IN be the vibration; that length and
s,mster Of the vibrating string. roo
y ,.4d affect the pitch; that vibrating
ebngs. sounding boards, etc, DIVIDE
'-o PARTS or segments tnodes) ana
citrate both In sections and as a
yaole,
lfer deducing the laws II sound the
-s,hanlSm Of the human voice, its
Ms care culture. etc. should be tax
y up al first by means Of experiments
vth the voices OF the children.
me professor has urged that the
,,ture study classes, should note and
.,6ssyor TO forecast the weather, The
rysnment signal service stations
~ a great aid In this direction. and
eer publications should be Ia the
,l-ds OF the teacher The class voted
u visit the weather bureau IN this
ay next week and Or Hyatt has
ssrteously furnished for tho News
accompanying storm map together
Nh description Of the ordinary
ut,her map given herewith.
DAILY WEATHER MAP
m weather map issued daily by the
Us weather bureau and distributed
10 nose who are interested II q well
lrow publication. II shows the sta
ts-, at which weather observations
a. AIKEN daily at 5 a. IN. and p. m.
Uthlngton time These observations
frsIst OF readings of the barometer
ngmometer (dry and wet. direction
sd velocity Of wind. state OF weather
kind. and direction OF the
louds and amount Of rain or snow,
nd are telographed TO Washington
md 10 many Of the weather bureau
tstians throughout the country tor
lublcation on maps and bulletins.
;olld lines. called isobars, are drawn
Trough points havn" the same at
nospherIc pressure SEPARATE line
cling drawn for each one-tenth Of an
rch IN the height Of the barometer.
lo,tsd lines. called isotherms. con-
Getting places having the same tenn
sraiure. are drawn for each ten de-
Tess Of the thermometer. Heavy
o,ted lines. inclosing areas where a
ecided change In temperature has oc-
urred within the last q hours. are
ometimes added. The direction 81 the
ma Ia indicated by an arrow flying
Mn the wind. or opposite 10 the or
mary vane. The state Of weather
neither clear partly cloudy. cloudy,
aiming. or snowing--is indicated by
h. circular symbol Shaded areas
hen used, show wnere rain or snow
AS fallen since the last observation.
VET AND DRY THERMOMETER.
The temperature Of the afr as pub
shed on the man Is observed with q
y.bulh thermometer 4 reading OF
he wet-bulb thermometer-that IL,
1twhose bulb is covered with a moist
rupping--is also made. but not pub
lshtl The evaporation from the wet