ITS MODIFICATIONS. 209 



Class k. Lateral solid angles replaced by single 

 planes inclining on the primary planes. 



Modifications g, and Ic, will produce a series of 

 rhomboids more acute than the primary, except one 

 variety of class g, which produces a rhomboid similar 

 to the primary. 



Class /. Lateral solid angles replaced by two 

 planes, which intersect each other at an edge that 

 inclines on the primary planes. 



Modifications h, i, and &, lead to a series of dode- 

 cahedrons whose planes are generally scalene tri- 

 angles. 





Class m. Superior edges replaced by tangent 

 planes. 



Produces a rhomboid more obtuse than th'e pri- 

 mary. 





