1896.] Water Current in Cucumber Plants. 559 
The leaves below the boiled part are still healthy. March 28, 
1:30 p.m. The stem and the petioles are still green but the 
latter are becoming more and more flabby, most of them at 
the top of the vine having lost all of their turgor. 
This vine was able to draw all the transpiration water nec- 
essary to supply a large leaf surface (more than 3.000 sq. cm.) 
through about 25 centimeters of dead stem for a period of four 
days, during a part of which time the transpiration was very 
active. All of this water must have passed up through the 
bundles, since all the outer parts were dead and dry and 
shriveled down onto the bundles, the vessels of which preserved 
their shape unaltered as shown by subsequent examiuation. 
(No. 13). This vine was 130 centimeters long. It bore six 
small leaves and 12 large ones, the best averaging 17 em. in 
breadth. March 22, 1:02 p.m. The stem was bent over near 
the earth and inserted for a distance of 18 centimeters into 
water at 90° C. In two minutes the temperature rose to 95° 
C. 1:07 p.m. Water simmering; temp. 97° ©. Boiled part 
not yet noticeably smaller. 1:10 p.m. Stem shows shrinkage 
and change of color. 1:15 p.m. Slight loss of turgidity in 
most of the leaves. 1:20p.m. A marked shrinkage of the 
diameter of the stem is now first visible. The flabbiness of 
the foliage is increasing rapidly, every leaf is affected. 1:27 
p.m. Water has remained at 97° since last record. Stem 
taken out because of the marked wilt of the foliage. This 
wilt appears to be due to the transpiration of hot water. The 
wilt is too sudden and decided to be due to anything else. 
The stem has not only shriveled in the water but also for a dis- 
tance of 10 cm. up and 5 em. below, making a total of 33 cm. 
of dead stem. Sun hot; earth and air of house rather dry ; 
transpiration active. Such an experiment were better tried 
when the air is nearly saturated and transpiration slight. 
1:45 p.m. Stem wrapped in many folds of rubber cloth. 
Roughly estimated it has shrunk to about one-third its nor- 
mal diameter. The leaves seem to be recovering their turgor. 
2:00 p.m. The lowest leaves are still flaccid but the upper 
ones have fully regained their turgor. 3:45 p.m. The lower 
leaves have now also regained their turgor. Its loss was 
