688 



DEPARTMENT OF THE INTERIOR 



GROUP IX. 



2 GEORGE V., A. 1912 





PLUTOSgC. 





Effusives. 







Essexite (Osann | , 

 and Rosenbusch). I ® 



60 



61 



62 





11 



— Oi 



u 



Ctf 



M.a 

 S3. 

 h3 



Augitite (Osann, 

 Washington, and 

 Rosenbusch). 



No. of Analyses. 



11 



4 



7 



6 



Si0 2 



48 

 1 



16 

 5 

 6 



4 

 9 

 4 

 2 



40 

 71 

 67 

 31 

 03 

 15 

 48 

 05 

 45 

 13 

 95 

 67 



54 



20 

 3 

 1 



2 

 5 

 5 

 3 

 1 



81 

 42 

 01 

 98 

 93 



32 

 60 

 86 

 13 

 46 

 48 



41 69 



•67 



14 80 



| 15-04 [ 



8 : 64 

 11-98 

 3-52 

 117 

 236 

 13 



42-25 



Ti0 2 



2*52 



A1 2 3 



16-26 



Fe 2 3 



843 



FeO 



5-46 



MnO 





MgO 



5 49 



CaO 



975 



Na 2 



K 2 



445 



192 



H 2 



P 2 6 



2 43 



104 



Calculated as Water-free. 



Si0 2 



48-86 

 173 



16 83 

 5 36 

 609 

 15 

 452 

 914 

 449 

 215 

 68 



55 



20 

 4 

 1 



2 



5 

 5 

 3 



62 

 43 

 31 

 04 

 96 



35 

 68 

 94 

 18 

 49 



42 69 



■68 



15 18 



| 15'43 | 



8 : 85 



1227 



3-58 



119 



13 



43 30 



Ti0 2 



A1 2 3 



258 

 16 67 



Fe 2 3 



FeO 



MnO 



MgO 



GaO 



8 64 

 559 



5-63 

 999 



Na 2 



4 56 



K 2 



1-97 



P 2 6 



107 











Each sura = 100 00. 



