AQtTTilOUS SOLUTION OP THK SOIL. 315 



below. Dr. Zijller analyzed the water that was tbus col- 

 lected fi'om a number of soils at Munich, in the half year, 

 April 7th to Oct. 7th, 1857. He found 



IN 100,000 OF LYSIMETER- WATER: 



Total, 47.23 2,5.40 29.20 30.52 29.15 



The foregoing analyses of drain and lysimeter-water 

 exhibit a certain general agreement iu their results. 

 They agree, namely, iu 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 Avith 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 wdth 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 ot 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 I 



— 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« 



