Bovie: NoN-AVAILABLE WATER IN SOILS 289 
has been completed. Five tall glass tumblers were selected, and 
100 grams of dry river sand placed in the bottom of each tumbler. 
The sand in tumblers 1 and 2 was moistened with 10 grams of 
distilled water. To the sand in tumbler number 3, 10 grams of a 
5 per cent. solution of sodium chloride were added. The sand in 
tumbler 4 was wetted with a 15 per cent. solution; and the sand in 
number 5 with 10 grams of a 20 per cent. solution of the same salt. 
A cloth diaphragm was then fixed in each tumbler, 3 centimeters 
FIGURE I. Apparatus for showing the influence of salt on vapor transfer in soils. 
Description in text. 
above the sand, thus leaving a free air-space between it and the 
sand. One hundred grams of sand were placed upon the cloth 
diaphragms of each of the tumblers. This sand, in all of the 
tumblers except tumbler number 2, was moistened with 10 grams 
of distilled water. Tumbler number 2 had 10 grams of a Io per 
cent. salt solution added to the sand above the diaphragm. After 
being sealed by tying sheet rubber over the top, the tumblers were 
then set in the basement, where there was but very slight variation 
in temperature (at least not more than occurs in field soils). 
After 10 days they were opened, and the amounts of water in 
the two layers of sand determined. As shown in the table, there 
