MODIFICATIONS. 



The right Rhombic Prism. 

 Fig. 315. 



269 

 \ 



M 



Simple and mixed decrements on the acute terminal 

 angles. 



General symbol E, represents class c, generally. 

 Ifp i=i 1, the symbol represents the middle plane 



of the series. 



p ^> 1. or <^ 1 ? the planes represented incline 

 more on plane P, or on the edge G, 

 than the middle plane does. 



Simple and mixed decrements on the obtuse terminal 



angles. 

 P 



General symbol A represents class a generally, 

 i 

 Ay represents the middle plane. 



Simple and mixed decrements on the lateral angles. 



1. On those adjacent to E. 



General symbol P E P , represents one series of 

 planes belonging to class d, which intersect 

 the lateral planes parallel to one of their 

 diagonals. 

 2< On those adjacent to A, 



General symbol P A P , represents a similar series 

 of planes belonging to class b. 



