EXPERIMENT STATION BULLETINS. 589 



The procedure followed in the second investigation was the same as 

 in the first and consisted of treating the soils with n/10 solution of 

 different salt solutions, allowing them to stand in closed tubes at room 

 temperature for about 24 hours and then determining their lowering 

 of the freezing point. To each soil was added a sufficient amount of 

 solution to bring it up to a very high moisture content, thus eliminating 

 some of the errors that occur at the low moisture content, and the 

 amount was exactly the same for all salt solutions for any one soil. For 

 each treated soil there was always a check, having the same percentage 

 of moisture, but made up only of distilled water. Great care was taken 

 to mix each soil sample with the solution or water very thoroughly. The 

 results obtained are detailed in Table 12: 



