Plate XX. 



/ 



o 



S 1 



S £ 3 ?2 



J/3 r "^ 5 

 C I » I 



o ti 

 o 



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Fig. 3. Fislnvay of 1SC6. 

 Plan in Outline. 



Ciu'rent. ■a^^- — >- 

 45 ft. 



v^.* 



,1-ddy 



Fig. 4. Pii.filo thninah C. D. 



' 60 ft.- 



