D eaf M ade to “H ear” Through F inger Tips Events in the Lives of Little Men THE FEATHERHEADS Felix Loves the Little Dears T h e discovery th a t th e hum an skin's ability to detect rapid vlhra tlons Is much g re a te r th an has pre- vlcusly been supposed has been m ade by Dr. Robert II. G ault, d irec to r o f th e vibro-tactlle research laboratory of Sm ith college. Doctor G ault hus been engaged for several y e ars In ex perim ents to enable the d eaf to hear through th e ir linger tip s by touching C o m p e n s a te * f o r L oss o f E n a telephone receiver. Previously scl e n lists have supposed th a t a vibra e rg y C a u s e d b y th e D e tion fa ster thun l.fidd tim es a second w as too fast to be detected hy the te c to r T u b e . skin. According to D octor G ault, how ever, these touch organs can detect P roperly designed radio frequency v ibrations as fast a s 2,700 a second. in ip litie rs contrbute not only to sen T hough m any of th e vibratio n s of the sitivity of a receiving set bui ulso to voice a re m ore rapid th an this, “oo,” >ts tone quality, according to resu lts for instance, as pronounced by the obtained from a se ries of te s ts con average m ale voice being about 3,800 ducted in one of the lab o rato ries of a second, and "ah " 3.682. D octor G ault a large radio com pany. says th a t if th e skin can receive vi T he function of a high frequency b ratio n s as rapid a s 2,700, It Is am ply am plifier in the la tte r re u se may be sensitive to u n d e rstan d s|>eech. T he difficult to com prehend a t first, since, discovery w as m ade w ith an In stru according to theory, it is credited m ent called the “ te le ta c to r,” designed only w ith am plification of very weak and built for his use by the Bell tele signals to a point w here they ure of phone lab o ra to rie s in New York city sufficient intensity to o p e rate the d e tector tube. To u nderstand the m an H is Position ner in w hich an r. f. am plifier im Gap Johnson w as trying to back proves q uality, a study of the func aw ay from the -crossroads sto re with tion of the detector tube will be found many yanks at th e reins and num er useful. ous yells and oaths. Ills d a u g h te r In effect, a detector tube Is really a sprang from the wagon and began “distortion" device since it is by dis beating the m ules over the head with tortlng one-half the incom ing rudlo a club. frequency w ave th u t the signal is “ Why don't you buy an autum n ! m ade audible. T h e disto rtio n of tills bile?" usked a salesm an who had a r . incoming wave is accom plished by o p rived during the operation. "It would cratin g the d etecto r tube ut grid and save you a lot of trouble." plate voltage values w here a slight "I'm usen to th e — p ’tu I— trouble.' positive cliurge will result In an ab was the reply. "I know how to handle norm al plute c u rre n t und a negative these devilish m ules and I w ouldn’t charged subnorm al p late c u rre n t with know how to m anage a c a r " respect to the effect of sim ilar churges “ Well, it might save the young lady on the grid if the tube w ere 0|>eruted a lot of unnecessary ex ercise ' on the “stra ig h t" p a rt o f Its grid volts “ Aw she's going to get m arrleu —p late cu rre n t c h a ra c te ristic curve. p r e tty soon an d needs the experience | Thus, the incom ing w ave train , hav- In m anaging a husband. Hud up. , ing positive and uegative alte rn a tio n s, the re, m u les!"—K ansas City S tar. will be re p re se n tad in the p late c ir cuit in the form of abnorm al plute H eadach es fro m S lig h t Colds , cu rre n t fur th e negative half and It | L a x a tiv e BROMO QUININE] T a b le ts re- Is this difference of p late c u rre n t val- I lle v e (h e H e a d a ch e hy c u r in g th e ('old. I/Odk for s ig n a tu r e o f E. W . G rove on ue th a t causes an audible sound in j th e box. 30c.— Adv. the phones. Since it la only the difference be A P la n t Puncture» T ire» tween the d isto rte d poeltive und neg W ur (*< mt hi tied ngniiiKl the “p u n c I ative hulf cycles th a t Is responsible J (lire weed. t ’ulifi»rni>i'H rapid »prcud for reproduction, It is evident th at mu vine whose h alf inch thorns plin much of the signal stre n g th Is lost in I imvoc with m otor cur tire s on couji (lie process— the low er h a lf of tl»e r.v mud». A single vine found n«*»r » u v e entirely m issing, plus th a t p a rt 1 Los Angelos covered m circle 14 feel of the upper h a lf lost through the hosperH te efforts to check oppoalng effect of the d isto rted lower ! icross (his troublesom e plant'» sp read ure j half. For th is reason, weak signals ■ lilndered h.v Its prolific seed. ..NRI to m ust tie am plified before detection, if i M pm re fo o t, t . • t im iture »11 year results of any kind a re desired. round tiud force » continuous hit I H e.— In the audio frequency end of the Popular Science Monthly. receiver it is found th a t, due to in- i ertlu of reproducing m echunlsm s, ttie i a ir and, lust but not least, the de- I tecto r tube, considerable energy is re quired to reproduce faithfully m uslcnl - W as Y ou r tones In the lower register. G ra n d m o th e r’s R e m e d y Pow erful audio am plification will F o r every stom ach overcom e the effect on Inertia of a ir i und in te stin al ill. and reproducing m echanism s, but It i T h is good old fash* cannot com pensate for th e loss of eu % loned h erb home ergy caused hy the d etecto r tube. ■ rem edy fo r ronstl- T he only remedy for th is Is ampUO- ajgjfr potion, Rtomach Ills cation before detection. T hus the ra •r* a n d o th er derange dio frequency am plifier com es Into Its m ents of th e sy it own us a c o n trib u to r to good audio reproduction, und the m ore well de em so p revalent th ese day s 1» In even signed stag es ahead of the detector 're n te r fav o r a» a fam ily m edicine bun in yotir g ra n d m o th er's day. th e b e tte r the quality ut th e output of the set. T h ere Is one draw back, F o rb id d e n to T rtm B e a rd however, In m ultistage radio fre A h is to ry o f th e ris e and fu ll o f the quency am plification, und th is Is due to pickup ant* in te rsta g e coupling be »card w o u ld m a ke In te re s t Ing read ng P erh aps th e firs t re fe re n c e to tw een various colls in the receiver ti< h fa c ia l n d o n im e n ts Is <o In* found W ith several stages of tuned radio frequency am plification, a receiver be n L e v itic u s . In w h ic h Moses g ive s ltie «» iiiiii ; nd. “ T lio n s h a ll no t m a r the comes so sensitive th a t colls In the set tend to act as m in iatu re loop •«oners o f th y h e a rd ." In n e a rly a ll • rle n in l la n d s In a n c ie n t tim e s the aeriu ls and th u s broaden tuning und »card was tre a s u re d un d h e ld In g re a t destroy selectivity. Such effects, however, a re neu tral , esfx < I ized w ith the ure of Individual stage . N e w T y p e of C a m e ra shields which not only elem inute ex tern al pickup and prevent In tersta g e , A tie s txp e o f cam era w ith (dates | coupling, but also, by virtu e of Intro «enslfive Io lig h t rg y a In v is ib le to duction Into the fields of th e colls, he hum an eye, can lak e pictu res tend to stabilize still fu rth e r the re- J hrough the thickest cloud o f fog. celver a g ain st oscillation. Most shields designed for th is purpose are j’ m ade of ulum inum and a re so planned i made H A N F O R D ’S th a t the covers a re m ounted on the j < subpanel or baseboard and the can | IT M U S T B E C O O D proper slipped into place a fte r all Try it for Cut», Braises, Sores, etc. w iring has been com pleted. An R. F. Amplifier Will Aid Quality 'jai-iiieid Tea FINNEY OF THE FORCE The Country Girl Can Get Along O. K. "Zj" SiM8 Balsam of Myrrh L o w Im p e d a n c e T u b e * AB 4 m le r* ara *wtk«nM<f to reto* 1 y M r a b ri! bottle if M tl«4. F Ur the H e l p A u c L o A m p lif ie r PASTOR KOENIGS N E R V IN E HOME SIZE SAVES L m oney 5s™« SO LU .'JIU GUARANTEED BY EVERY DRUGGIST B oschee’s Syrup h a s b een r e lie v in g c o u g h s du e to c o ld ! fo r s lx t y - o n o y e a r s . Soothes the Throat lo o s e n s th e p h leg m , p r o m o tes e x p e c to r a tio n , g iv e s a g o o d n ig h t's r e st fr e e from c o u g h in g . 30o and 90c b o ttle s. B u y It a t y o u r d r u g sto r e. G. G. G reen, In c., W ood b u ry, N. J. CORNS Ends pain at once/ In one m /nafe pain from corns Is ended. Dr. Scholl's Zino-pads do this ta fa ty by removing the cause— pressing and rubbing of shoes. T h e y are thin, medi cated, antiseptic, healing. A t all drug and shoe stores. Coot but a tritie. D r Scholls 'L in o -p a d s P u f one on —the" pain h nonet Whooping' Cough Relieved Thin dr**a<1 cough Is on« o f the t daugwn.ua o f children'« mum *«. diRMUM «. There I n no c u r* for whoopmgeough. ltu n u ally runs ila c o u r w . h u t* few drop« o f thia w e ll kn o w n p h y s ic ia n *» p ro - •rrip tio n w ill relieveUifl violent roughing parox ymns,and avoid vomiting. N o dangerous “ doa- In g 1' nothing to upset liploatutnarha. Glaaac« ULESSCO SSJ CHOUP R E M E D Y croup. STOP CHILBLAINS T h e crippling annoyaneea o f chilb lain«, th a t I ndeacr lia b le h a lf numbneaa and h a lf plain In th e fe e t canard by exposure to snow o r cold, q u ic k ly relieved by Cat boil W h y suffer w hen a 6 0 -c rn t box of Carboil w ill take th e m isery out of w alkin g ? G et a box a t you r druggists now. Y o u r money b ack I f not aattofled. S P U R L O C K N E A L C Q „ NashvlUo» T an a, 0 0 Y O U S U FFE R F R O M asth H A? Ig ' rw-ratlnfMhavefonndrwIlef In OttowTar fUv.tfc. lug and hraJing P» m. muranea of thruat an.I lunga H A L L A R U C K E L N e w Y o rk O il lU ty a lt y A c re a g e K e v ln » o n b u rn t fle lft, Mont T a r m a I 10 « h m » »a. 1100 p u r r h a a e d , t e l & I I « in a ia li p a y a b le t-a c o m p le tio n p io . d u r in g w e ll. A . I I . C a m p b e ll. O llm o n t. M o n t. P A R K E R ’S H A IR B A L S A M « rm la & d n ir npallairlaJUi R eatw rea C o lo r and B e a u ty to G r a y and F a d e d H a ir Vn- a n d | l <n a t h n ig g i r t a . H ' -M . • . I V. » ■ I . I L . N $ F I.O R F S T O N S H A M P O O l.k a l for ose in rotine« Uon with Lark« r'a H air Ito aam Makes th» hair soft and fluffy l$n cents by ma l or at drug, trials 11 tocoX Chemical W orks, P n U h o fM , N. X. 4 r <ip 9 I n « d r u « • la tram Alkail or s t h i r Irrttollo”. Th« aid ahnpl« r*tna»ir Uiat bring* c-aoitwtlnT é te g d U tt HaJIABerfca« Saw V a r ia ti M it c h e ll i»" : E ye r n-t S a l v e la bast. St«, ad For S O R E E V E S An audio amplifier is g reatly im proved if the tubes used | m ihk csh low o u tp u t im pedance values. T ills Is p a r ticu larly (rue If the am plifier coupling unit a re tran sfo rm e rs designed sev- I Traw iM far M JS IN U S . TRADES er FR0FESSI0N3 L it r o ll a n y tim e . S end fo r l i t e r a t u r e . e ral y e ars ago. T h is should be of O R E O O N IN S T IT U T E O F T E C H N O L O G Y special Interest to -ecelver ow ners E . M . 0 * A . IIK Ig . P o rt la u d , Orej^oo who p urchased th eir equipm ent two or th ree y e ars ago. T he Im provem ent In quality am plification w ith old lype I Heeulta wondwrfnl and attr»-. O n tto b m p -i* b> < PR|T e $150 AT y0UR DRUG STORE I o f Krw m ola aktn bleach w ill co ivtn r« the w d tra n sfo rm e rs w as conclusively deni- i ah ep llc al A lso enrew ♦•«•*», a. Prien | ] ft. A *« adik fa r Sample »«r d e a le r ItoaiH y florifelct Free I n C, II. o n stra te d In a series of ex p erim en ts | £ •rry tk».. Dept. M. fctfl M ichigan A » e .tk i« w g o "KOENIG MEDICINE CO. conducted at the Zetka lab o rato ries [ 1045 N WELLS ST. CHICAGO ILL. | W N U , P O R T L A N D , NO 51 1927. w ith some of th e ir low ou tp u t Imped- 1 a nee tubes. A th o u g h t it*»*« m » n k ite » m lot o f Good quality radio am plification 1 T alk may be a g<»»<l preventive. tim e w h e n he litirr h » . cannot be obtained unless (lie low I notes a re sa tisfac to rily am plified, and | If low output Im pedance tubes are used b e tte r energy tra n s fe r on low j n o tes will tie obtained. As a m utter ) of fact, b e tte r energy tra n s fe r will lie btalned on all frequencies. Usually For gmeratlnns Cuticura Soap .n d O in t ment have afforded the purest, sweetest snd a tube w ith a low o utput Im pedance most satisfactory method of p io n v r, g snd has a low am plification constant, but m aintaining a healthy condition of skin the overall am plification of the tufie- and acalp. Tender-faced men find the coupling unit Is ery seldom lowered. frreiy-iathertng Cuticura Shaving Stick a Iiei-ause w ith the low er o utput Imped necessity. Cuticura Talcum is an ideal slice and a constant load Im pedance a powder, cooling end refreshing. g re a te r portion of the voltage a ia ll Ota at « and «to Talrwwe able In th e tube la delivered to the load. Use low Im pedanre tubes tri all C e O e w r a S h a r i n g S to c k 2 5 c . sockets In the audio am plifier. S C H O O L F O R M EN Epilepsy Nervousness fr Sleeplessness ' Cuticura Preparations for All the Family FK