al 



I 



" s QUDofl ft pi 



mU U»J1F*ii Frfieai 



©jm tirpimau H»UI»IJ Freqmacj •'. Milan, I7ilat. Tltoni, ul Pratt* Currt Ir^rkuU UuiUl ItaqDCWJ ■! BlUtltftrl, BiontD, Lundun. Bojiod, 1 



Illustrating Prafessoi Schusters Paper ah /As Connection between SuttSpoti and lirrtstnal Pliarwm&m 



have general! 





