Fig. 7. 



— Tm f&g^ ^///e Sfor^. - 



^/yai^c/; }^/e. 



^Aa</ sA^A'/^^ c//s//^/^^//<^/7 a/ /^/a/7^S /ct//></ /^ ^^S^/oc4'^ <'/ '^'^'^/e ■ 



Petr-ce/7/<76e Sccf/& 0/ C/afsses. 



