H. P. Armsby—Absorption of Bases by the Soil. 27 
Representing graphically the results of the first series (I) we 
obtain the curve No. 1 in the figure, showing the influence of 
the relative volume of the solution on the absorption by soil 
No. 1. The other three series give exactly similar curves, and 
the influence of the concentration of the solution is seen in 
curve No. 2, which represents the absorption by fifty grams 
of soil No. 1 from solutions of increasing concentration. 
140 = 
~ 
——>| ABSORPTION 
8 
| 
10 20 30 40 50 
But not only these experiments, but all others on the subject 
accessible to me show essentially the same result. With the ex- 
ception of a single experiment by Laskowsky (Knop, Boni., etc., 
p. 150) the absorption never increases proportionally to the soil, 
hor 1s it, as is sometimes stated, independent of its amount. 
In order to study the absorption of bases by hydrous silicates 
+, artificial silicate was prepared in the method described by 
Way (Jour. Roy. Agr. Soc. of Eng., xi, 313). 
