MINERALOGICAL NOTES — ANDERSON. 



281 



vertically. Three crystals were measured ; the figures show a 

 typical, partly idealised crystal with all the recognised forms 

 except g. 



MEAN ANGLES. 



California Creek, Mr. Garnet, Queensland. 



(Plate lxxxi., fig. 5.) 



This crystal, kindly lent by the Director of the National 

 Museum, Melbourne, measures 1 x 3 x 2 5 cm. in the directions of 

 the axes a, b, c respectively. It is brown in colour and is attached 

 to a matrix of quartz and decomposed mica. In habit it is 

 tabular on «(100) ; the faces are dull, and, for determination, 

 pieces of cover-glass were attached ; thus the angles obtained are 

 approximate only. The probable new forms, p (103) and o- (301) 

 were determined by the following measurements with contact 

 goniometer : — 



a'A<r = 20°, calc. 20° 17'. 

 «/\ p = 94l°, calc. 94° 50'. 



In all teu forms are present, namely : — c (001), a (100), m(110), 

 /(210), a;(T01), p(T03), cr(301), -y(Tll), ^'(211), s(311). 



