No. 2.] 



TRIAD SYSTEMS— WHITE, COLE, CLJMMINGS. 



at) 



PLATE I- SYSTEM VI 3 Ay. 



FIG I. 



-H 1 



Fig. 2 TlO. «. Fio. 1S2. F'°- "83. 



A 



A 



A. 



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:i. ::::». -:^ ^^ 



Fig 2in. 



^, 



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\ ^^.x. 



H 



:^^ •:^^:i»_l 



no. 211. 



no. 21.1. 



FlO. 214. 



^ 



PlQ. 206. 



