44 



COLORADO FERBERITE AND THE WOLFRAMITE SERIES. 



wolframite group. All measurements were made with a Goldschmidt 

 two-circle goniometer. 



Average of best measurements. 



(010) : (110) 



Fair reflection: 

 50 16' 

 22 

 23 

 12 

 24 

 20 

 22 

 16 

 15 



Poor reflection: 

 50 31' 

 27 

 28 

 22 

 17 

 20 

 21 



Average of 9 measurements with fair 



reflection, 50 19'. 

 Average of 7 measurements with poor 



reflection, 50 24'. 

 Average of the 16 measurements, 1 



(001) : (Oil) 



Good reflection: 

 41 00' 



01 



00 

 40 59 



59 



57 



57 



58 



56 



53 



56 



Average of 11 measurements, 40 58' 



(010) : (210) 



Good reflection: 

 67 27' 

 23 

 24 

 26 

 25 

 31 

 25 

 32 

 21 



Fair reflection: 

 67 17' 

 23 

 16 

 28 

 19 

 27 

 30 

 26 



Average of 9 measurements with good 



reflection, 67 26'. 

 Average of 8 measurements with fair 



reflection, 67 23'. 

 Average of the 17 measurements, 1 



67 25'. 



(001) : (102) 



27 46' 



49 

 27 43 



45 



37 



50 



Average of 6 measurements, 27 46'. 

 (001) : (100) 



89 50 7 

 34 

 32 

 33 



Average of 4 measurements, 89 37'. 



In the measurements of the prism angles the (j> angle was obtained, 

 this being the same as the angle (010) A prism. The v or zero 



i Good measurements weighted twice as much as fair ones; fair measurements weighted twice as much 

 as poor ones. 



