MOVEMENTS OF SALTS IN SOILS. 77 



added, the soil being removed 7 days after the last distilled 

 water had been introduced. 



In the case of the Lancaster soils the salt solution was added 

 to all cylinders between July 12 and 19, and the soils were re- 

 moved from the ones to which no distilled water had been 

 given, on the 29th, making a capillary period of 17 days. Dis- 

 tilled water was introduced between July '28 and August 24 

 and the soil was removed on August 31, making a capillary 

 period of 50 days for the second pair of cylinders. 



At Janesville the solutions were added to the soils between 

 July 11 and 15, and the distilled water between July 27 and 

 August 29. The cylinders receiving the solution had the soil 

 removed on July 29, making the period of capillary movement 

 18 days. The soil was removed from the distilled water pair 

 on September 1, making this period 52 days. 



WATER-SOLUBLE SALTS RECOVERED AFTER CAPILLARY MOVEMENT. 



At the close of the period of capillary movement, in each 

 case, the soil was removed in consecutive layers, the first four, 

 one inch each, and the balance, two inches deep. At Upper 

 Marlboro the soil was not sufficiently firmed to prevent settling 

 when the water was added, with the result that the columns were 

 shortened by shrinkage the amounts indicated in the tables 

 which follow, where the amounts of salts found at the several 

 depths in the different soils and under the different conditions 

 are given. 



