AQUEOUS SOLUTION OF THE SOIL. 315 
below. Dr. Zoller analyzed the water that was thus col- 
lected from a number of soils at Munich, in the half year, 
April 7th to Oct. 7th, 1857. He found 
IN 100,000 OF LYSIMETER-WATER: 
Potash, 0.65 0.24 0.20 0.55 0.38 
Soda, 0.71 0.56 0.7%4 2.37 0.60 
Lime, 14.58 5.76 %.08 6.84 9.23 
Magnesia, 2.05 0.89 0.18 0.29 0.51 
Oxide of iron, 0.01 0.63 0.83 0.5% 0.43 
Chlorine, 5.5 0.95 2.08 3,94 3.58 
Phosphoric acid, 0.22 - _ - _ 
Sulphuric acid, 1.75 2.71 2.8 2.93 3.35 
Silica, 1.04 1.13 1.5 0.95 0.93 
Organic matter, with some \ 20.4 12.59 18.6% 12.08 10.19 
nitric and carbonic acids, 
Total, 47.23 25.46 29,26 30.52 29,15 
The foregoing analyses of drain and lysimeter-water 
exhibit a certain general agreement in their results, 
They agree, namely, in demonstrating the presence in the 
soil-water of all the mineral food of the plant, and while 
the figures for the total quantities of dissolved matters 
vary considerably, their average, 36} parts to 100,000 of 
water, is probably about equally removed from the ex- 
tremes met with on the one hand in the drainage from a 
very highly manured soil, and on the other hand in that 
where the soil-solution is diluted with rain or spring water, 
It must not be forgotten that in the analyses of drain- 
age water the figures refer to 100,000 parts of water; 
whereas, in the analyses on p. 311, they refer to 100,000 
parts of soil, and hence the two series of data cannot be 
directly compared and are not necessarily discrepant. 
Is Soil-Water destitute of certain Nutritive Matters ? 
—We notice that in the natural solutions which flow off 
from the soil, phosphoric acid in nearly every case exists 
‘in quantity too minute for estimation; and when estimat- 
ed, as has been done in a number of instances, its propor- 
tion does not reach 2 parts in 100,000, This fact, together 
with the non-appearance of the same substance and of oth- 
