56'^ Report Bnt U 



Plate IX. 



2 Curves plotted from Table II. 



50 lOO 



W 

 u 



> 

 ir 



ID 



o 



w 



> 

 ir 



o 



a: 



.50 72 O Jgc 2<y«? 2W 2*0 S^C' Jfi-C* Z&y. 



Efficiency Curves from Table I 



SU 200 



SO 120 160 ZOO Z40 280 320 360Ths. 



