46 



5. Titanium. 



The titanium (Table 41) is very uniformly distributed uu the two 

 drifts, and on the three types as well. The amounts found on the 

 Kansan are slightly higher in all cases than those found on the Late 

 W'isconsin. thus resembling the alumina in distribution. 



Tabic 41. — Titanium in the dilTcrcnt sections. 



Carrington silt loam Fargo silt loam • Carriiigton loam 



Depth Kansan Late Wis. Kansan Late Wis. Kansan I ate Wis. 



Inches |ier cent per cent per cent ])er cent iier cent per cent 



1_ 6 0.64 0.50 0.60 0.60 0.68 0.60 



7_12 0.64 0.52 66 0.60 0.73 0.60 



13_24 0.64 0.54 0.73 0.60 0.69 0.58 



25—36 0.70 0.53 0.72 0.60 0.60 0.58 



Average 



1_36 0.66 0.53 0.69 0.60 0.67 0.59 



6. Lime. 



The total lime (Table 42, part 1) varies almost directly with the 

 carbon dioxide. On the Carrington silt loam the amount in the first 

 three sections is practically the same on both drifts, varying between 

 1.0 and 1.25 per cent. In the third foot, however, the quantity on the 

 Late Wisconsin is niore than twice as great, reaching 2.08 per cent, as 

 compared with 0.93 per cent on the Kansan. 



On the Fargo silt loam there is not a wide difference between the 

 amounts of this constituent in the different sections on either drift, and 

 the average for the three feet is 1.89 per cent in the case of the Kansan 

 and 1.97 per cent in that of the Late Wisconsin. 



The amount of lime in the different sections of Carrington loam is 

 remarkably similar, the dift'erence between the two drifts for any given 

 level being no greater than that between duplicate determinations on 

 the same sample. All calcium compounds at all readily soluble have 

 evidently been leached out of this type to a depth greater than three 

 feet. 



The amount of lime in the form of carbonate was computed from 

 the carbon dioxide content (Table 42, pt. 2). On the Carrington silt 

 loam, only in the second and third foot-sections of the Late Wisconsin 

 is any appreciable quantity shown. On the Fargo silt loam the second 

 foot-section on the Kansan is the only one to show a deficiency in this, 

 while with the Carrington loam on both drifts the carbonate has been 

 leached out to a depth greater than three feet. 



By deducting the lime as carbonate from the total amount the 

 quantity in the form of silicate is secured (Table 42, pt. 3). On the 

 two prairie types, this decreases from the surface downward. On the 

 forest type, the Carrington loam, the first and fourth sections show 

 like amounts, while the intervening two are alike and show somewhat 

 smaller amounts. 



