| Show SYSTEM OF SIGNALS more ingenious Ingin lou scheme than thai that contemplated bf b germans ably never was devised german war secre tit are now helenj disclosed in at the close of the conflict the germans in their were HI on secret signal light tights of pedal special character to the ordinary observe observes nothing would be b prent present to indicate that the light was as tending sending out signals but changes would be solas going ua on which would be apparent to an observed ob nervel servet quIP wd W view it with a suitable ul tabi Opt optical icI device different principle principles were employed for accomplishing thin in one of 0 them polarized light waa was to be beut eat out by the signal the ch character ameter of 0 litch would change la in accordance with the dot and dashes of the he code when ahen viewed through prope ly fit ted led the olor would no longer be white hite but would altercate between red and ereo green in another method a glan glass screen containing compound compounds of 0 the rare element eitt nent didymium was to alternate la to the beam tam ot of light with another creen screen of suitable aal tabi hide shade when the resulting light wa was viewed with binocular equipped with prisms a black lino line would appear la in the yellow region of the spectrum epe trum formed whenever the didymium lum flail glass was wn interposed permitting the signals t tt t be wl L another method consisted la in first break aug up the tight at the dource luto into a petrenia petr nia across which was placed one on or more wims cutting out narrow regions of 0 color and thew were arranged to be moved bade back an aal forth a abort short distance dit tance along the arec trum in signaling the colon colors were recombined into whitam iam and transmitted with binocular binoculars provided with suitable aul table prisms to reform re form the spectrum the signal waa was pere perceived elved in the motion of daric dark band bands back and avid forth along the spectrum pec trum correspond ine ing to the movement of the wires nt at tha the trana transmitting station one ono tin OP application of this meth d of 0 len allne would be at sea popular magazine Macai inc |
