.CHLORITE SCHIST. 291 



THIRD DIVISION. 

 Compound : with three or more ingredients. 



FIRST SUBDIVISION. Laminar, alternating. 



A. Foliated chlorite, felspar, and quartz. 



This is enumerated among the varieties of 

 gneiss, but is also introduced here, as it occurs 

 in both series, and is equally entitled to a place 

 in each. 



SECOND SUBDIVISION. Granularly laminar; 

 mixed. 



A. Scaly chlorite, quartz, and felspar. 



B. Scaly chlorite, felspar, and mica. 



C. Scaly chlorite, hornblende, and mica. 



D. Scaly chlorite, hornblende, quartz, and green 



compact felspar. 



The preceding enumeration will, I believe, 

 contain all the varieties that can be included under 

 this head ; and, as in other instances, they pre* 

 sent transitions into different rocks ; a circum- 

 stance of universal occurrence among the mineral 

 compounds, and which must always render any 

 arrangement, to a certain degree, arbitrary. 



The only minerals hitherto observed in chlo- 

 t 2 



