SOLVENT I PER CENT CITRIC ACID SOLUTION 



SOLVENT HYDROCHLORIC ACID 



200 



lyime added. 



0-253 g rs - 

 0.2540 grs. 

 0.2488 grs. 

 0.2483 grs. 

 0.2527 grs. 

 0.2517 grs. 



i gram,. 



1 gram.. 



2 grams. 

 2 grams. 



P 2 O 5 sol. in 

 i per cent citric acid. 



0.0033 g rs - 

 0.0038 grs. 

 0.0044 grs. 

 0.0052 grs. 

 0.0048 grs. 

 0.0052 grs. 



Per Cent 

 soluble. 



1.4 

 1-7 

 2.0 



1.8 



2.0 



From the results it is seen that lime increased the solubility 

 in i per cent citric acid considerably as in the preceding experi- 

 ments. The increase is somewhat less, however, with the arti- 

 ficial soil. 



With regard to the solubility in - hydrochloric acid, the 



addition of lime produced little change. The differences are 

 within the range of experimental error. It is to be remarked 

 that the solvent action of the hydrochloric acid was very small. 



(c) ACTION OF LIME ON SOILS. 



For the purpose of studying the effect of lime on the phos- 

 phoric acid originally present in soils, two samples of the latter 

 were taken. The soil designated "A" was a sandy loam under 

 cultivation. Soil "B" was a clay loam not under cultivation. 



Samples were prepared for analysis according to the methods 

 of the Association of Official Agricultural Chemists 1 . 



i U. S. Dept. Agr., Div. Chem., Bui. No. 46, 71. 



