264 Wisconsin Academy of Sciences, Arts and Letters. 
to be perfectly intact. The entire outer liquid was finally evap¬ 
orated to dryness and the LiCl determined in the residue. It 
was found that the 1200 cc. of the liquid contained but 0.0267 
grams of LiCl. The pressure rose slowly, the mercury column 
measuring over 50 cm. after the first day. On the sixth day 
the mercury column measured 51.5 cm., the temperature being 
24.0.° On the twelfth day the mercury column measured 53.2 
cm., the temperature being 20.95;° on the fourteenth day, 54.9 
cm., the temperature being 21.96;° on the fifteenth day, 54.2 
cm., the temperature being 19.6.° The beater containing the 
outer liquid was then packed in melting ice. The temperature 
sank to 2.0° and was kept there for 12 hours After two hours 
of thus cooling, the mercury column w T as only 9.0 cm. high and 
remained there without change for the remaining ten hours. 
The ice was allowed to melt gradually for the next twelve hours. 
When the temperature had reached 21.4° C. the mercury meas¬ 
ured 56.1 cm., this was on the seventeenth day. During the 
next three days the outer beaker was again kept surrounded 
with melting ice. It w^as difficult to keep the temperature of 
the apparatus perfectly constant during all this time. It grad¬ 
ually sank to 2.2° and finally to 1.6.° When the temperature 
had reached 1.6° the pressure indicated by the manometer was 
2.9 cm. and remained constant for six hours. The temperature 
was then gradually raised, and at 20.5° the mercury column 
reached a height of 53.0 cm. w-here it remained constant for 
twelve hours. The outer beaker was then surrounded with a 
bath of a temperature of 36° C., the change to lhat temperature 
being made gradually; which, of course, was also done in the 
preceding cases where the temperature of the bath was rad¬ 
ically altered. At 36° the height of the mercury column be¬ 
came constant at 101.0 cm. and remained so for about half a 
day, when the temperature of the bath w r as gradually raised 
to 58.7° and kept there. At this temperature the mercury 
column rose to a height of 128.3 cm., where it remained prac¬ 
tically constant for two hours. The temperature was then 
gradually permitted to fall, and at 25.5° C. the column in the 
manometer finally registered 51.9 cm. on the last day of the 
