288 IT. E.Ford — Mineral Notes from th Mmeralogieal 



comparison a new analysis given by Foote and Langley. The 

 different analyses follow, the values in brackets being the orig- 

 inal values given by Penfield and the writer. It will be noted 

 that the correction has involved a change of about two per cent 

 in each case. The ratios given are derived from the corrected 

 values. 



CD 







CO 







t* 













Tf 



. 





CO 



o 







— 









: 



o 



o 



T»< 



<M 



OS 





S3 











fa 







o 





tJ 





















r^ 



CO 



.2 





CS 





Tf 



_ 





CO 





s 





in 





O 



CM 





ipH 





ce 



CO 





a> 





CD 



T* 





o 





a 

 45 



M 





© 





© 



t 1 





© 





: 





















z 





















fa 







<M 





OS 



IO 





o 



© 







o 



00 



OS 





T* 



© 





CO 



to 



— 





c© 



rH 





o 



6 





© 



OS 



t-4 





Tf 





I— » 



n< 







os 









C5 







CO 



Tf 















.t- 



— 



o 



1-1 



o 



CO 











© 



c 



© 



r—j 



OS 







CO 



















"^ 



_o 









rH 











•d 



'■3 



















^ 



s 



















o 



fa 



Oh 





OS 





^H 



© 





*> 









lO 





o 



CO 





O 





a 







JT~ 





00 



■ra 





o 









o 





o 



—i 





o 























tJ 







, „ 





, s 











"ffi 







lO 





00 











td 







CO 





os 











co — ■ 



CO CM 



CO 

 © 



© g © 



fa" o§ 



M 



o 



fa 





CM 



CO 



r- 



o 





<p 



I— 1 



i— i 



© 



1 















, . 



, — , 











© 



Tf 







T3 

























cd 



cd 

 PI 



CD 



fa 



CO 

 OS 



^ 



OS 

 CO 









fe> 



o 



o 



CO 



CO 



h-i 



'£ 



o 



co 



<M 



US 





CO 



!>• 



OS 



© 









co 



Tf 







a 













o 





-, 









2 

 '3 



CD 



fa 



co 



cT 



o m 



c? 



CO 



C 







