1896.] Water Current in Cucumber Plants. 377 



submerged part, which has kept its turgor and resists diffuse 

 staining better than the parts in the air. The plant is dead. 

 March 26, 2:40 p. m. About 12 cc. of the eosine has passed up 

 the stem since yesterday p. m. 



In this plant over 40 cc. of the eosine water passed up the 

 stem during the first 24 hours, and in the next four days an 

 additional 45 cc, part of which after the plant was dead. 



Vine No. 1 which was 188 centimeters long, also took up the 

 eosine water after it was dead. This absorption of the stain 

 continued long after the leaves had become dry-shriveled, and 

 did not entirely cease until all parts of the bright red stem 

 became bone-dry. This vine was under observation 14 days, 

 during which time about 150 cc. of 1 per cent eosine water 

 passed up the stem, only 57 cc. of which went up during the 

 first 491 hours. 



(No. 25). This was a young vine, measuring 100 centime- 

 ters above the cut surface. It bore 17 leaves, the largest 6 

 averaging 13 cm. in breadth. March 28, 11:56 a. m. The stem 

 was cut under water and put at once into an alkaline eosine 

 water, made by putting 1 gr. eosine into 100 cc. of £ caus- 

 tic soda (the solution stood in the laboratory over night 

 and became darker colored). 12:01 p. m. The red stain is dis- 

 tinctly visible in the veins of all the leaves, even the upper- 

 most ones, i. e., it has gone straight up a distance of one metre 

 in 5 minutes. It is sunny and windy, and transpiration is 

 active. The dry bulb registers 22° C; the wet bulb 17.3° C. 

 12:10 p. m. The foliage begins to droop. 12:40 p. m. Foliage 

 wilting very badly. 2:10 p. m. About 5 cc. of the stain have 

 passed up the stem. The lower leaves have begun to crisp at 

 the margin. March 29, 2:30 p. m. About 7 cc. of the stain 

 have passed up the stem since the last record. The blades of 

 the leaves are crisp and the petioles are bright red. March 30. 

 Fluid quite dark ; an additional 4 to 5 cc. has gone up the stem. 

 Stem and petioles much brighter red than yesterday. April 

 3, 11 a. m. The entire stem and all of the petioles have become 

 extremely bright red, the eosine water (20 cc. of it) having 

 continued to pass up the dead stem since the last record. The 

 leaves appear to have taken up no stain since March 29. 



