59 



Table of forms of eudidymite. 



ovre Avö Lille Arö') Narsaisuk 



. С =v{00l} X ... X ... X 



, Ъ =>{010} X ... X ... X 



, e =v{0. 10. 3} . . . . X X 



^p =v{053} X 



d =^{502} X . . . X 



X =^{lO. 0. 2} .... X 



( .g =w{5(^} X X 



. I =v{310} X X 



ni =v{335} X ... X ... X 



=.{111} X ... X 



, ,s =v{552} X ... X ... X 



r =^{221} X 



f =4Й4} X 



g =4338} X 



h =v{559} X 



sv =v{334} X ... X ... X 



V t =v{55l} X ... X ... X 



v^ =/{15.5.3} X 



.h =4X5.5.3} X 



V i =v{625} X 



y =^[^Ъ. 5. 18} X 



The measurements from which the different forms of the 

 eudidymite crystals from Narsarsuk have been calculated are 

 given below. 



, Ô : e = (010) : (OOl) = 

 , e : Ô = (0. 10. 3) : (OlO) = 

 ^^\:Ъ = (053) : (OlO) = 

 v2 : с = (501) : (OOl) = 

 yu : с = (335) : (OOl) = 



Measured 



Calculated 



90° 



90° 



15° 11' 



15° I2V2' 



28° 28' 



28° 30' 



76° 15' 



76° 17' 



37° 5' 



36° 49' 



Bull, of the Geol. Instil, of Upsala, 1898, Vol. 4, p. 16. 



