BASE, AND ITS MODIFICATIONS. 143 



Class g. Solid angles of the base replaced by 

 single planes inclining more on the lesser edges of 

 the base than those of modification e. 



Classes e/and g, would give the lateral planes of 

 a series of right rhombic prisms. 



Class h. Solid angles of the base replaced by two 

 planes, one edge of each new plane being parallel 

 to a pyramidal edge of the broad primary planes. 



Class t. Solid angles of the base replaced by two 

 planes, one edge of each new plane being parallel to 

 a pyramidal edge of the narrow primary planes. 



Class k. Solid angles of the base replaced by two 

 planes, neither of whose edges are parallel to any 

 edge of the primary form. 



