1 92 1. No. 8. 



ON THE ECLOGITES OF NORWAY 



29 



ha = 1-675 + 0.002. 



2\'y = 58 (determined with a net-ocular) 



= 59" (determined with a Becke drawing table) 

 c : Y = 40 appr. 



This analysis may be calculated as follows:' 



Diopside 83.48 



Jadeite 7.38 



Enstatite 4.67 



Tschermak's silicate 4.12 



Unaccounted for 0.73 



100.38 



The specific grayity of the rock was found to be 3.510 (t = 13°). 

 The rock being practically bimineralic, its mode could be calculated from 

 this \-alue and the specific grayities of the minerals: 



Pyroxene 55.16^0 

 Garnet 44-84 „ 



' In the calculation of the analyses of pyroxenes I have accepted the method followed 

 by F. W. Clarke in R. Heber Bishop, Investigations and Studies in Jade, New York 

 1906, 1, p. 133. 



