390 a Palache- 



-Crocoite from 



Tasmania. 







Average 





Number of 





Calculated. 



measurement. 



times measured. Limits. 



m*™* 110 a 110 



86° 19' 



86° 14' 





14 85° 59'-86° 31' 



Z r. zT Oil A Oil 



83 31 



83 38 







w*w' 012 a 012 



48 11 



48 12 







y *y f 021 a 021 



121 35 



121 40 







k a v 101 a 111 



36 9 



35 41 







Ta & 5-3-0 a 010 



60 38 



59 55 







Sa & 10-3-0 a 010 



74 17 



74 13 





3 73°-75° 15' 



The two prisms (10'3'0) and (5'3*0) were represented by 

 exceedingly indistinct faces, reflections from which were only 

 dimly visible with the d ocular of the Fuess instrument. On 

 this account they are considered doubtful and are not intro- 

 duced into the figure. The first form 

 S (10'3'0), is unrecorded ; the second, T 

 (5'3'0), is enumerated among doubtful forms 

 by Dauber. 



The remaining forms are shown in the 

 figure in about an average development ; 

 but their proportions vary widely in various 

 crystals with either t (111), v (111) or forms 

 of the clinodome zone predominating. 

 This combination of forms is exceedingly 

 like that shown by Dauber* on a crystal of 

 crocoite from Berezov in the Ural, which is 

 somewhat surprising considering the widely 

 different paragenesis of the mineral in the 

 two localities. 



Mineralogical Laboratory, Harvard University, January, 1896. 



* Berichte Akad. Wien., xlii, fig. 93, PI. II, 1860. 



