68 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. ivol. xiv. 



FtO. 200. 



Fio 2U1; H polygon ot iwenty sides. 



\ 



^ 



Fio 202; H polygoa ol twenty-tour sides. 



:^- 



Fig. 203 H polygon of thirty eidcs. 





•^. 



^ 



riii. :::^j-=. 



Fio. Wi A polygon ot seventy-lwo sides. 



