50 



COLORADO FERBERITE AND THE WOLFRAMITE SERIES. 

 Measurements of *L{710}. 



The occurrence of Z{710} on crystal 14 has already been noted 

 under A'{1 1.2.0}. On crystal 5 it is present twice as broad faces, in 

 each case unaccompanied by other rare prisms and forming the only 

 face between a(100) and Z(210). 



Measurements of*H{Q04}. 



a Approximate. 



b Not measured. 



This new dome, always present as a line face, was noted on 12 

 crystals, as shown in the table. The reflections from the faces were 

 either very poor or not discernible, so that the approximate measure- 

 ments (expressed only in degrees) were made by using the position 

 of maximum illumination. The form is near to the simpler one 

 {201}, but the measurements show that {904} are the correct symbols. 

 The calculated p angle for the form {201} is 64 37'. 



Figures 25, 26, 29, 30, 33, and 34 show the new form 77(904}. 



Measurements of *B {123}. 



On crystal 13 the small face of B gave a poor but distinct reflection. 

 The occurrence is illustrated in figure 25 (p. 66), an ideal representa- 



