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ABSORBING MATERIAL .. _SOUND A3SORBING MATERIAL HKANGING LO0SE PLASTER -} How Walls I Are Made | Sound-Praof. SOUND ABSORBING MATERIAL AS PLASTER BASE | harged above th ished surfa the most efficient d i £ 1 drop w 1 reac a double reflector pla the proper ¢ ants of the latter, who se angle in the w i o the funnel te. owed advantageous to hay the inside shell curved in concav form, in order to reflect back b ons that woul t past t! shield. Testing the muffler on a fc floor window, it was found to exc! i Will Chemistry Fir " o 5 % . . o | i “Many noi v ~° D G e v ; biie i s it to on a Cure for Cancer? a Device ing Registe . ‘ o - i e th c possibility seen in a new N man’s present civ - ) i Nalume 5 b . L . . . ] ing ‘ on the e i el tion noises have been S o Nowe . % . ba increasing by leaps and bounds, and there is not much indication that they are going to decrease sp t 1 ause th and ¥ raps, Can human beings adapt ! actio a small number > and intensive expe t Ba e Wi L to noises without suffering may b C 8 rule E undertaker the laboratory to . enine & J or plan 2 This imays be it the opinjonyof leading SLUIE, RIOWEVEE, FILLESE S0 0 5 over these cri points for vari t g Sonande i on scientists, a very vital question for the termittent noises appear to be me nd ir 14 So far the future of the race instigators of fear reaction = In an effort to ans i % the he f action the psychological lat “ol- i vt i k d- above this direction of Prof. Donald A. Laird, Ph. D., Sc. D., contraction of L : tisa relates to the consump- with strips of f St sitfe ¢ V‘/ is in the midst of a series of experi- d base b wair 2 Lhout 3 s bodily. soft ri e ayiis t 3 se can : I 77 s ments which will continue through sev- involuntary —mu ! ’ du g isi wstoni eral yea Data have been wathered found in hu bject he fear condi i nsumpt from sources ranging from champion reaction, c \ increase in m ECo it s g Vac o 4 ol R O typists with a speed in excess of 200 cular tonus tensi Pulse ir axhaled I words per minute, to white r: blood pr ., and br iing are n con indications to date, as Prof 8 her biol phenomena which may eans il has found, confirm the suspicion that ¢ tied the fear reaction.” There are | ot “If th U to) at Washi noises may be a more seri T niversity of Michigan a othods th 3 t all t rog ve Buildi than the average pers 5w rs ago, for instance, a slecper follow to pro a desirable quic 1o tendency to tra throue 2 admit. s bei died. It was found that iverage ., howeve: t 1se through increased wa ent from Until about two years ago it en yassed his window in the convinced t noise S not possible to measure noi e, T he night, the noise of the ties. Then the audiometer we ¢ machine caused a r in blood pres ed to measure noise intens E r ven though the s >r did not scale from 0 to 100, 0 being a j ir awaken audible intensity, and 100 an - In experiments upon typists in the sity great enough to make the ea Colgate University laboratory it was drum tingle on the verge of pain found that when the noise in the test closing the win is would : owemuffler’ was Prof. Laird says, that he has found /ch peducd only 15 per- . ovent the entrance. of SH Ra T hich the sound waves very few places where people work cent ¥ a 9 per cent increase In p.vo colved th yroblem in my sleep- that are below an intensity of 50 units, OUtput, and that about one-fourth less {47¢ S0 Hell EUS BEAD € 0 G =6l The laboratory noise intensity that cut bodily energy was burned up in doing '8 "% beanbing & wallt board into the output of typists by o per the There are two remark i ] LA cent and into rigorous mental work | at t !in‘fl:m s o L SR R Y MILK BOTTLES Made of Paper harm in noi Is 1 cent greater Laird in the Scientiic output,” fessor Laird continues, *“is FTER forty rs of undisputed with puper bottles, no hand does not appear to lie in probably due the unredu to the ear or ditory tensity e just above what tentativel called a critical leve! ! are an stin; G h t s, before the 15 per cent re- made of paper, for which many advan s dairy’s plant. From fear reaction. Common noises fro u in the te amber tages are claimed over the old-fashioned ~ the moment the ¢ ets of paper everyday perience illustrate this ave g n 1sity. are placed in the bottle-making ma- fa The shiver up one's spine when fuc oets. is is SRl G O chine they continue on their formation a file or caster squeaks; the involun- indicated by the fact that reducing the The manufacturers of the paper milk until the contair » sealed and tary jump at the unexpected report noise still more did not affect the out- bottle claim that because of the positive discharged. upon conveyor that of a pistol; the fear of thunder storms; put Apparently e is a and air-tight | and the nature of takes them to the table. the fatigue after a noisy railway critical poir he intensity scale of the container the milk will remain W 2 ftness . 5 : - = journey. noises above which the fear reaction fresh and palatable for as long as five machine then at the lig weeks, as tests have shown. This is due bottom and send bottle on it.is explained, that milk to the paraffining process, where it is Se Or A E aced in the ¢ er at a made air 1 and sterile S @l it s 5 e “nd itors. Bene e i T s . w wus the Greeks wh topless cars used for travel tion of passengers to be found any ever, are us- where else ’ ng rooms, especially, sh y quiet Wit ng noises enter Much of the Capitol Professor L. S g . series of tests calculatec subterranean, are rarely the nature of so milk bottle is now them before they are placed in use, new rival th chinery f r manufs temperature than it can be filled Now HY do so many SRR Sy passengers, f the m > most important 1 especially women, o Sl e i white vitiified when alighting from a ¥ i i e e & L et B iRutediby elact street car or train, get off ! N | ter rowth b . 5 ssors fork or poi -re_automatically necting the gr fice bu backwards? Whatever the ordinary d tributers cool milk f cking in glas ind akes it and pres answer to this question - may be, street car offi- cials in Germany are overcoming this tendency by placing mirrors on the ire o ok gt rvell exit doors of the cars, as ‘ . nay | i ousd L oo et T pErdEEs ) Yol @l A || bstiete U GPIRAL DRIVE for the MOTO ing illustration reproduced BB i : B avieTIe REONLIE or € be pr S Vb T preserves the freshness and sweetness gers are induced to is a non-conductor of heat, sla vel over ice or packed smow, ! e front and rea » they are dr ar worms meshing forward just be S s a conductor, mil refore, can b T PRy SSoihe 1 frames whic vide ) T aen e ing and thus prevent a 0y ; vered, it is pointed out, i AR S \ iRy s Eara nas as these ts are connected possible fall. A i g condition in paper.. ; e LA Rl 2 e BSar s S : STt ward st universal joints Such accidents are com g . | According to the : adjustable drive ¢ nism consisting ups LAl D c shaf the sp mon among ‘omen, ar - ) paper | of interrupt ral blades that will ece 2 5 e rotith 1 blades f are also ro- explanatipn bein at, 5 ! . ol S e-quart cent, hite into the aind which may 8 4 S 5 ated, giving th, ct of a four- due to centuries of ex 7 > g | t e 0 replace the wh the 2 g € perience in carrying chil \ s, r f f dren on the left arm and working with the right t milk bottles throug - ¢ s exceeds $15.000,000 port when | : = | The loss in New car or train. This causes £ where 4.000,000 them to face to the rear, 3 y ! r used daily, is put which is the wrong po 7| pointed out that with the con sition for getting off any er milk bottle into general moving vehicle. ry companies will be abl wwin xperiments to bottle have been carried on for . The paper of whick bottle is composed is made The Passenger Instinctively Looks Into the Mirror ontihe Door of Exit aan Thus Is Compelle = i i conaledito = § wood fibre. The bott reat A Cross-Section View of the Sviral Drive Used to Replace e Bl il S i ; Wheelsiand PropellaniAutomiobile Oyerica or Packed Siaw. ; before use. There can be no t e i e LRI I P T 38 U A 1 0 R 4 s s B LR 07 i s 1551 Ao