REPORT OF THE CHIEF ASTRONOMER 



SESSIONAL PAPER No. 25a 



GROUP IV. 



683 





Plutonics. 





Epfusives 





r 





21 



22 



23 



24 



25 



26 



2' 













cd" 

 cS 



so 



c 



bD-< 













O 



•^ 





TJ 





^ 







,e 







a 





a 





a 



& s 



05,5 





«~. 



^ 



a 



a 



c3~ 



i* 



C. ffl 





c3 tj 



to CO 



£i ■ 



CD C 



CO 







O 



CD 

 +3 



CD 

 CO 



lite (O 

 Lacroi> 



e Phon 

 nn and 



CD O 





•-H CO 



03 c 

 O^ 



CD 



P 



o3 



CD US 

 CD — ■ 



ll 



eucit 

 (Osa 

 ton) 



11 





fe 



t3 



>-} 



fc 



Dh 



i-3 



h3 



No. of Analyses. 



10 



3 



3 



43 



25 



4 



S 



Si0 2 



56 11 



45 61 



54 36 



54 63 



57 45 



54-89 



49 83 



Ti0 2 





45 





130 



•86 



•41 







71 



A1 2 3 



21 



33 



27 



76 



19 99 



19-89 



20-60 



21 



28 



19 



00 



Fe20 3 



1 



87 



3 



67 



2-79 



3 37 



235 



3 



04 



3 



17 



FeO 



1 



47 





50 



2-58 



220 



103 



1 



49 



3 



59 



MnO 





05 





15 



18 



•35 



13 





01 





17 



MgO 





55 





19 



1 72 



■87 



•30 





66 



1 



79 



CaO 



1 

 8 

 6 



72 

 48 

 4G 



1 



16 



3 



73 

 25 



72 



296 



8 28 

 4-98 



251 



8'26 

 5 46 



150 

 8"84 

 523 



2 

 5 

 8 



31 

 62 

 39 







7 

 6 



69 



Na^O 



19 



K 2 



15 



H 2 



1 



50 



01 





42 



•22 



•64 



1'35 

 25 



2 04 

 12 



2 



31 



1 



93 



p 2 o 6 



78 





















Calculated as Water free. 



Si0 2 ! 56-96 



Ti0 2 -46 



AljOs i 21-65 



FeaOs I 1"90 



FeO ...J 1-49 



MnO 05 



MgO -56 



CaO ! 175 



NaaO 8-6L 



K 2 ! 656 



P 2 6 i -01 



45 80 



27 



88 



3 



68 





50 





15 





19 



1 



74 



16 



32 



3 



74 



54-48 

 130 



20 03 

 2-80 

 259 

 18 

 172 

 297 

 830 

 4 99 

 '64 



55-38 



•87 



20-16 



342 



223 



•35 



•88 



2 54 



8-38 



5 54 



•25 



58 65 



•42 



21 03 



2'40 



105 



13 



•31 



153 



9 02 



534 



•12 



56 19 



2i 



78 



3 



11 



1 



53 





01 





68 



2 



36 



5 



75 



8 



59 



•' 1 



50-82 



"72 



19 38 



3-23 



3-66 



•17 



183 



5-80 



733 



6-27 



79 



Each sum = 100 00. 



