| Show fill 0 LEARN UW LAWS WE f STUDY m OBJECTS CIS Scientific Knowledge of Now HoW Sound May be Gained by Observation WEATHER BUREAU TO fO VISIT Im t II Y to In he hel l Entertained bl M 11 Dr Pr Hj i Di Director rector of or signal Station yesterday v stud Iud udy cites It said V r 1 of or V t l Prof Cummings u thud child make the discovery ery tM the Itt great greal law late in to nature study Iud d dI I I I the WI according to 10 the best beat If toll Jet tf of f the the modem school Thus Thua lira Ia oil ld learns learn earn from rom experiments P I kind Is he may be told rome fome sot m U K Kit open to 10 ordinary ob era ji 11 p and doer cloes lie ma mil may be told tk t round waves of or the air the tho H I t t when also the powder ponder maga magi 1 Arsenal Af nal hill hili exploded y tf on t mott nott of or the e window windows H In i b O or of h 11 a s city fit th y how the HIe sound rowed FOunt of Cf voice Ol often th the theof I of the Ih avalanche In the Alps Ip how 1 tr rf a pistol In a lighted room roomi ut I ri r y fut PUI out lamp or ran can tiM i V The and other phe pher he erL old uld M follow not precede the tho r nr rde fi tade ts percepts obtained i rot a br LAWS LAS LA we OF GF SOUND therefore atei aret ate are of or tl be j s A tit i t di dw ird r by h the use u e of or the pen pent r showing the taw of 01 Ha lis vibration t tr Gur r to UK till length then U It t Is Isn I In w n t H t an clastic steel spring free frees that a 1 v vt 1 a y s CM e s Is a pendulum I t ig i c g Is III a n pendulum etc that thatto tit to he the tension and the great greatH reat force of or gravity on ona H If rapid 1 pendulum the more a be he the vibration lon that length and eume r of f the vibrating string rodg rod affect the pitch that thai vibrating g s rK board etc eta divide nodes nodee and ia ra 0 or segments and as see a arf aoe arnie dra W 11 both In sections rf oe tc W deducing the laws lava of sound the f sets ha sm ism of or th the human voice olce ltd its 11 i are culture etc should he be tak take r e up p kl tat t first nr t by br means menna of or experiments t th h b t tae le Ie voices of or the children The professor has hn urged that the Ihl t IMe sure ure study stud classes clu e should hould note no Ie end and or to forecast the weather The signal service stations ut tae t iiI great aid in this direction and tt tl allon should 1 b be In the tide Irdi II I of or the teacher The class dUI voted Acted i t I to aril the tM weather II bureau In this rj r y J text lext week and end Dr Hyatt I ha hal has rte ugly furnished for the News together to ether i is aj storm map a u II r des of or the tho ordinary iVi her fr r man t neu herewith DAILY MAP IP The weather map Issued dally dall by b the weather bareau end and distributed I Ill oho vh h are Is q It well ell tr p v It Il shows I how the eta stu III IIII I Mut J wItch which weather ob awaken t f aken dally daily dall ut at 8 Ii n a m in and S 6 p 11 m nn min in r time These 1 cIe observations r H of or of 01 the barometer m dry Ir and wet 11 direction re d lont of wind Ind state stale of 01 weather ir 1 j At t kind and direction of or the duds rais r 1 and amount of rain or M snow Kno Knor M rd r are orf re telegraphed to IOn ii u f many man of or the weather bureau 1 iv s a hot the Ih country o for forN put N atlon allon MI nn 0 maps mails and ancl HI Vi L ines Ie called Isobars are arf drawn Sir sr OlGh gh i harln the Ih same mme at al pre ule n a separate line 1 i Jr drawn for of an anh ani i h 1 ii 1 the height of or the barometer I h t M 4 1 lines line called isotherms ron eon roni i r tl places having the Ih same panic tern future are drawn for each Mh ten In de lit dep Pi rH p of Cor the Ihl thermometer Heavy UNI O lines in lo areas where hue a 1 1 1 change In temperature has hilI oe ur Pd the Ih last II f tenure hours are lire arem I m The direction of the thes theR R IA s Indicated b by an All arrow urn ft flying n h i the Ihl wind or opposite to tn the Ihl or orI I nr acv r vane The state of weather her clear dar partly cloudy cloud cloudy i Ir r tf I or snowing Is indicated by b bIh ib It symbol Shaded areas r u tJ r used show II hI whet where rain or snow Ki hr I I fallen tAllen since the last lut ob observation WIT AND O DRY Tit The temperature of or the air as pub rub het 1 on tin the man IK Ise observed with A ar r thermometer A 1 reading or of orIn f ih In h wel bulb thermometer Is I II Its s I hole hoes bulb U is covered with a mo inflict t 1 vr r Is al also abo o made hut but not pub i l The evaporation from the tha wet fl ted surface If It the air Is 18 not saturated with moisture Is IN nw more mol rapid rall than Ihan fr orn the Ih dry bulb in to 10 UK the Ih i rela la the amount of Jf aqueous lUe vapor apor n rn 1 the theair air The difference of temperature be between b tween the readings rM of there hese two tarn mer ther Is III u 1 to compute the relit rein the lire Ih humidity humid II of or the Ihl atmosphere Th The temperature of or tho the wet tf bulb Is 18 lower IOler than Ihan that of or the tho air a II given ghen by b the th dr bulb thermometer n account of or the evaporation from the n h bulb The wet temperature i sometimes relied called the en temperature be bi because 14 cause taus the of or hr hat hrat t on the Ih skin agrees more mort closely clo h with nIth Its Indications than with those of or the dry If thermometer tel ter The map published with ash nh this I represents the Ih most moat reent disc ere and nd deductions In n to 10 This U Is not the weather map mal de ce above STORM MAP tP or OP TilL UNITED STATES The general movement of f storms In Inthe inthe the Iho States Is from west to 10 east eol similar to 10 a sHIM series i of et wares wats of or which the cren crets are dr d on nn the Ihl mat map Highs II II h II and n th Ih e troughs or I Lows I Ws The alternating highs and lo lows g ha hal have an average mo lIt of or about miles per day da winds wind with lIh rain CM Or snow usually Usually ally nil the low lo area aru often oHen extend extendIng f extending Ind Ing InK to a distance of miles mile to t Ikeo Ike e of or the Ihl center of or the sturm rm In I advance of or the low the Ihl winds are art gall K orally fall southerly and consequently bring high temperature h n e center of ot the low passes to th the t east et or of orn ofa a n place the wind at lit once shifts hilt to e eveet west or northwest 1 bringing lower t to te r I Southerly Souther to 10 easterly wit 11 U I prevail west of a nearly north a II d 1 south line passing parsing through the mill t tor of or n B high also nl o eaf east t of or a like line pa paIns paIn Ins ing In through the middle of or a n K Ie Northerly to 10 westerly winds occur w n 1 t I of or a nearly north and south line All pa Ion Ing log through the middle of or a low lo III ii t I tabo j nl aleo abo 6 taut tut of or a similar one through t tl middle of or a II high The temperature ol o oa j ja a given glnn parallel west of or the low mal malbe ma mabl mabe be bl reasonably looked for on the sam ear j parallel to 10 the east a t when hlo the low huf hul huland passed pared and fro frol t will occur along and amP an I north of nn an Isotherm of about 10 19 de Ie degrees degreen green grees If tr f the night Is le clear and there lher thereIn In is but little wind Areas of or low lo pleasure pI frequently mol mou to the south couth of or ear from the tM Rocky ock mountains to the l and umi then Ihen change hange direction to 10 ha th north of or eat east en 1 over on the eastern half of or orthe the country countr Storms In the Gulf of ot Mexico occasionally move moe to the west westor lIe westor l lOr I or north nf of west went 11 but hut after reaching the coast they generall change hune di III direction reckon and move mete to 10 the northeast northeastward ward sward High areas move more to the south southeast southeast east a t and are nr usually u attended by b fair fairand fairand and coo fool cool or cold weather A cold wave ware 1 is always accompanied by b a 1 high |
