Profs Pr: F. M 
Stereographi 
Bre! n of 
a 
1 
Stereog’ 
tr bucecuimgs 
Plate 
Fig. 4. 
Stereographical Projection of the Röntgen-pattern of 
Diaspore. Plate parallel to (010). 
A oe : EE @ + et A 
RUUD BRUCE amana en ene ni 
