REPORT OF THE CHIEF ASTRONOMER 

 SESSIONAL PAPER No. 25a 



GROUP II. 



681 











PLUTONICS. 











Effusives 









9 



10 



11 



12 



13 



14 



15 



16 





-a 

 a 



S3 



EC 

 (3 



si 



e3 



Syenite, 



dmarkites, 



Akerites, 



s. 



a)- _ 







CD 



CO 



si 



CD 

 so 







 a 



s3 





T3 



S 



5 03 







c 



S 



C 

 sS 







CD 





O 



c 



C 





,5 c 



S °S 



s3 

 



O 



-a 





a 



CD 



s3 



GO 

 O 



c 



s3 



O 







a 

 so 







a 



CD O 







c3 

 S- 





•H.9 

 5.3 



is 



-2^ 



,5 c 



® O 

 . ~£ +s 



H be 



verage 

 includiii 

 5 Pula 

 and 3 L 



0) ° 





f? CD 



is ° 





£ 



Pn 



<! 



< 



50 



48 



M 

 7 



O" 



No. of Analyses. 



7 



5 



8 



23 



13 



Si0 2 



64 36 



61 86 



6196 



61-99 



60" 19 



60-68 



6151 



75 45 



Ti0 2 



16 



45 



81 



19 



15 

 07 



17 



99 



07 



17 



56 

 93 



16 



67 

 28 



17 



38 

 74 



17 



45 

 37 



13 



17 



AI2O3 



11 



Fe 2 3 



1 



08 



2 



65 



91 



35 



?, 



22 



2 



74 



?. 



64 



1 



92 



1 



14 



FeO 



2 



71 



1 



49 



3 



37 



2 



29 



3 



28 



2 



62 



3 



35 





66 



MnO 





15 





01 





09 





08 





14 





06 





01 





29 



MgO 





72 





55 



1 



38 





96 



2 



49 



1 



12 



1 



26 





34 



CaO 



1 



55 



1 



47 



3 



41 



2 



55 



4 



30 



3 



09 



1 



08 





83 



Na 2 



5 



76 



6 



45 



4 



65 



5 



54 



3 



98 



4 



43 



5 



23 



5 



88 



K 2 



5 



62 

 70 



5 



75 

 47 



3 



80 

 93 



4 



98 

 76 



4 

 1 



49 

 16 



5 

 1 



74 

 26 



5 



2 



29 

 45 



1 



36 



HgO 



69 



P2O5 





OP 





08 









14 





98 





94 





08 



IS 



































Calculated as Water-free. 



SiOs.. 



Ti0 2 . . 



AI2O3 . 



Fe 2 3 . 



FeO.. 



MnO. 



MgO. 



CaO.. 



Na 2 



K 2 0.. 



PX> 5 . 



64 



81 



62 



15 



6255 



62 



46 



60 



90 



61-46 



63 



06 



75 





45 





15 



100 





56 





68 



■38 





46 





16 



93 



19 



16 



17 23 



18 



07 



16 



47 



17 97 



17 



81 



13- 



1 



09 



2 



66 



2 37 



2 



24 



2 



77 



2-67 



1 



97 



1- 



2 



73 



1 



50 



340 



2 



31 



3 



32 



266 



3 



43 







15 





01 



09 





08 





14 



06 





01 







73 





55 



1-39 





97 



2 



52 



113 



1 



29 





1 



56 



1 



48 



344 



2 



57 



4 



35 



313 



1 



11 





5 



80 



6 



48 



4 69 



5 



58 



4 



03 



4-49 



5 



36 



5 



5 



66 



5 



78 



384 



5 



02 



4 



54 



5-81 



5 



42 



1- 



•09 



■08 





14 



•28 



•24 



•08 





17 

 ' 20 



15 

 •66 

 •29 

 •34 

 •84 

 •92 

 •27 



18 



Each sum =100 00. 



