SOME CALCITE CRYSTALS WITH NEW FORMS 3 



w{4153i, G;!7295|, 2^13145}, z;{2131 } , r j 5382 | , )' | 3251 | , 

 and a new form p | 4.20.24.7 } . The following table gives the average 

 of the measured angles compared with the calculated value. 



The indices of the form above referred to as 1 4.20.24.7 | could not be 

 definitely determined. Many faces of this form are present in these 

 crystals, in fact, the form is a characteristic one for this group as it is 

 present on all the crystals. But it is always rounded and uneven and 

 will give when mounted on the goniometer, either a group of reflec- 

 tions or else two or three distinct signals. The various measurements 

 for this form are given below. 



