Show measuring sleep persons differ ery greatly in their mode of slumber eluin ber some awaken HI tit the noise while alle others are only refused with till difficulty dini culty these thein differences hae been carefully claset fled by scientists lien scientist scientists speak of how fant fast a person they mean how deep Js his sleep not ot only Is it po ua bible to measure sleep but there are lire different monn mclind of ding at so g one method Is in by a steta bull the ball bull ie Is drop dropped at increasing di four six eight ten tacie inches nod and so on until the deeper sleeper becomes conscious of the he sound ond and dakens in this V ay by scientists can find out how deep was vias his ills bleep arball another iler method Is to touch llie tile sleeper with an electric wire ire noting the intensity latel SItY of the current I 1 used with indelible lah ink cham character cifer write it itis autograph on i ill xanna |