REPORT OF THE CHIEF ASTRONOMEh' 



SESSIONAL PAPER No. 25a 



GROUP XIV. 



693 



Calculated as Water-free. 





Dike-rocks. 





88 



89 



90 



91 



9 



Tingi 

 (Osan 



i 





Granite- 

 aplite (Osann 



and 

 Washington). 



Bostonite 

 (Rosenbusch 



and 

 Washington). 



Grorudite 

 (Osann and 



Solvsbergite 

 (Osann and 



laite 

 1 and 





Washington). 



Washington). 



Washington). 



No. of Analyses. 



15 



5 



5 



8 



15 



SiO* 



7500 



61 32 



70-91 



62 16 



5502 



Ti0 2 





30 





89 





48 





31 





36 



A1 2 3 



13 



14 



18 



43 



11 



50 



17 



58 



20 



42 



FejOs 





58 



3 



84 



4 



58 



3 



05 



3 



06 



FeO 





40 



07 



1 



60 

 01 



1 



88 

 39 



1 



80 

 18 



1 



82 



MnO 



22 



MgO 





30 





46 





11 





48 





59 



CaO..., 



1 



13 



1 



45 





39 



1 



11 



1 



67 



Na 2 



3 



54 



5 



75 



5 



43 



7 



30 



8 



63 



K 2 



4 



80 



4 



94 



4 



08 



4 



95 



5 



38 



H 2 





71 - 



1 



31 





25 



1 



04 



2 



77 



P 2 6 



•03 











04 



06 



Si0 2 .. 



Ti0 2 . 



AUO3 



Fe 2 3 



FeO.. 



MnO 



MgO. 



CaO.. 



Na 2 0. 



K 2 0.. 



P 2 6 



75 



54 



62 



14 



71 



09 



62 82 



56 





30 





90 





48 



•31 





13 



23 



18 



67 



11 



53 



17 '77 



21 





58 



3 



89 



4 



59 



308 



3" 





40 



1 



62 



1 



89 



1-82 



1 





07 





01 





39 



18 







30 





47 





11 



•49 





1 



14 



1 



47 





39 



1 12 



1 



3 



57 







82 



5 



44 



737 



8- 



4 



84 

 03 



5 



01 



4 



09 



5-00 

 04 



5 



f-59 

 •37 

 1 00 

 f!5 



l-87 

 •23 

 ■61 

 .■72 

 i'87 

 i-53 

 •06 



Each sum = 100-00. 



25a — vol. iii — 45A 



