CHEMICAL Ck M POSITION OF GLACIAL LAKE SOILS 51 



Table V, continued 



Chemical, Composition of Soils Deposited by Water. 

 Complete Analyses 



Glacial and Western Soils 



1. Insoluble 



2. Silica (Si0 2 ) 



3. Alumina (A1 2 3 ) 



4. Ferric iron (Fe 2 3 ) 



5. Ferrous iron (FeO) . . . 



6. Sulfur trioxid (S0 3 ) . .. 



7. Phosphoric acid (P 2 5 ) 



8. Lime (CaO) 



9. Carbon dioxid (C0 2 ) . . . 



10. Magnesia (MgO) 



11. Soda (Na 2 0) 



12. Potash (K 2 0) 



13. Water 



14. Organic matter 



15. Volatile matter 



XII 



a 



o3 



hO 



03" 



55.60 



14.80 



5.80 



0.15 

 5.70 

 4.94 

 2.48 

 1.07 

 3.23 

 5.18 



XIII 



0J 



cs.2 

 1 



03 terl 

 CC 



Oj" 

 .C OJ 



66.69 



14.16 



4.38 



41 

 j.29 

 2.49 

 0.77 

 1.28 

 0.67 

 1.21 

 4.84 

 2.00 



XIV 



o 



9) 



M 

 oj 



02 



Oi 

 .0 



O 



T3 



19.24 

 3.26 

 1.09 



0.53 



0.23 



38.94 



29.57 



2.75 



t 



t 



1.67 

 2.96 



XV 



oj oj 



1 



03 * 



OJ 



i-l 



56.17 

 24.25 



3.54 



2.09 



2.57 

 2.25 

 4.06 

 4.69 



XVI 



oiS 



- 



* s 



r* 03 



C .P.S 



~ c 



OJ--. o 

 l-l OJ 



^ , 



i2 * 

 <-> 2 3 



40.22 

 8.47 

 2.83 

 0.48 

 0.13 

 0.05 

 15.65 

 18.76 

 7.80 

 0.84 

 2.36 

 1.95 

 0.32 



soil formed in stream bottoms is friable and easily tilled, 

 but they also give rise to some of the heaviest and most 

 intractable clay soil known. Soils of this sub-group may 

 be either very uniform or exceedingly variable in fine- 

 ness. It is evident from what has been said that, the 

 smaller the stream, the more variable the soil is likely to 



