21 



ON THE CONSTRUCTION AND DIFFERENT FORMS 



SECOND CL VSS. 



B, 



A' 



B: 



i.lJJj 



(*W 



(•W) 



(W) 



L 24157 18 

 i ■ t3J 6 19 



817164 II 

 5B)46| 3 22 



2 2315s 17 



91 ll] 520 



- fl|63 12 



j ' 15 421 



9 32J49 40 

 54 35] 1 1 27 

 L6 25156 33 



51 38|H 30 



1031150 39 

 53 36|1328 

 15 26 55 34 



52 37] 12 29 



(•W) 



(*w 



Wfl.) 



(B 2 A') 



