144 TRAVIS— PYRITE FROM CORNWALL. [June 22 



( 1 1.8.5) was observed as one narrow face on crystal 21, and two 

 fairly good faces on crystal 23. 



ii.8.5/\iii. 



Measured 17° 05' (Crystal 21 ; signal poor 



and faint) 



Measured 16° 59' (Crystal 23 ; signal good) 



Calculated 17" 01^' 



(15.11.7) was observed as one face on crystal 25. The face is 

 quite good and is about i mm. wide. 



15.11.7A111. 



Measured 16" 2)2>' (signal good) 



Calculated 16° 32' 



(14.11.8) was observed once only on this type, on crystal 26. The 

 face is about 0.2 mm. wide. 



14. II. 8 f\ III. 



Measured 12° 2>7' 



Calculated 12° 2,2,' 



(876) was observed as one good face about 0.7 mm. wide, on 

 crystal 23. 



876 /\ III. 



Measured 6° 44' 



Calculated 6" 39' 



(12. 1 1. 10), a new form, may almost be regarded as vicinal. On 

 crystal 26 the following measurement was obtained : 



12. II. 10 /\ III. 



Measured 4° 19' (signal poor) 



Calculated 4** i5' 



Fig. 9. Type II. 



