1894-95] 



201 



In conclusion, I wish to express my sincere thanks for the 

 kind assistance I have received from Miss S. M. Thompson, 

 Macedon, Belfast, and Professor Grenville A. J. Cole, of the 

 Royal College of Science, Dublin, in the preparation of this 

 note. 



TABLE i. 



Four analyses of marine Glauconite by Sipocz taken at 410 

 fathoms, Lat. 34 13' S, Long. 151 38' E. From the '• Chal- 

 lenger " Report. 





I 



2 



3 



4 



Mean. 



Si0 2 



56-62 



50-85 



51-80 



55""7 



53*6i 



Fe a 3 



15*63 



24-40 



24*21 



21*59 



21-46 



Al 2 O s 



12-54 



8-92 



8-67 



8-12 



9*=;6 



FeO 



ri8 



i-66 



I- 54 



t*95 



1-58 



CaO 



[•69 



1*26 



1 27 



i'34 



i*39 



MgO 



2-49 



3"'3 



3'°4 



2-83 



2-87 



K 2 



2-52 



4-2 1 



3-86 



336 



3 '-19 



Na 2 



0-90 



0-25 



0*25 



0-27 



0*42 



H 2 



6-84 



5'55 



5*68 



5*76 



5'9 6 



Total, 



100-41 



100*23 



100 32 



100*39 







rCasts — White, 













c 



pale grey, and 



Per Cent. 



Per Cent. 



Per Cent. 



Per Cent. 





3 



yellow 



65 



15 



IO 



3° 





<2 K 



C O 

 O CU ( 



Pale Green 



20 



35 



25 



40 







Dark Green ... 



I 1 



45 



60 



20 





u ° 



a 



Mineral particles 













§ 



and siliceous 















k organisms . . . 



14 



1 5 



5 



IO 





