86 Mr. E. Hatschek on some simple Deformations 



general character. We assume that all edges remain equal, 

 so that the deformed polyhedron will be bounded by rhombs- 



Fia:. 2. 



of two kinds, six belonging to the prism and six to the 

 rhombohedron (fig. 3, a &,b). 



Tetrakaidecahedral partitioning. — The equilateral cubo- 

 octahedron is deformed by a stress acting in one of the axes 

 of the octahedron. The polyhedron may be looked upon as 

 a combination of a tetragonal pyramid with the pinakoid and 

 the prism of the opposite order, and preserves this general 

 character when deformed. To ensure continuity the follow- 

 ing conditions must, however, be satisfied : the eight regular 

 hexagons are transformed into symmetrical hexagons, having 

 two pairs of sides all equal to one-third of the polar edge of 



