VOL 20, 1908, PL. 31 



SINGULAR DIRECTION 



NO SINGULAR DIRECTIONS 



IRHGMBIC 



TRIGONAL 



! FOLD 



TETRAGONAL 



HEXAGONAL 



ISOMETRIC 



6 FOLD 



2 FOLD 



4 FOLD 



TRIPYRAMIOAL 

 HEMtMORPHIC 



TRI PYRAMIDAL 

 HEMtMORPHIC 



TRIPYRAMIOAL 

 HEMIMORPHIC 



TRIPYRAMIDAL 



TRIPYRAMIDAL 



TRIPYRAMIDAL 



/< 



\ / 



' \ 



-X- — -i 



/' \i/ \ 



TRAPEZOHEDRAL 



I \ 



( | 



TRAPEZOHEDRAL 



^ ^ I / ,<\ 



f-m-— H 



TRAPEZOHEDRAL 



L...^l— j 



TETARTOHEDRAL 

 PENTAGONAL DODE<AHEDRON 



y \:/ > 



PENTA60NAL 

 IC0S1TETRAHEDRAL 



1 L l 



r — i— "1 



TRISPHENOIDAL 



i _y; j 



TRIRHOMBOhEDRAL 



DAL HEMIMORPHIC 



D1PYRAMIDAL 



DIPLOIDAL 



SCALENOHEDRAL 



SCAULNOHEDRAL 



HEXTETRAHEDRAL 



YSTALS 



