BULL GEOL. SOC. AM. 



VOL. 21, 1909, PL. 33 



Figure 1. — Goat Island End of ilAix or Caxadiax Falls 

 Drained February 16, 1909 (Spencer) 



Figure 2. — Western End of Main Falls 

 Already curtailed by lengtli of wall. Further drained February 16, 1909 (Spencer) 



PORTIONS OF NIAGARA FALLS 



