173 
ing and the length of cortex removed. This, if proven, though it might 
not be of much yalue in itself, may bring us a step nearer to the final 
answer of that great question, How does sap rise in plants? 
In the experiments with tomato, gladiolus and one of the maples, no 
definite results were secured. The tomato stems were very tender and 
transpiration was so rapid that the stems would wilt in a short time, 
remain wilted until sundown and then revive only to wilt the next morn- 
ing. The gladiolus specimens used were secured from a bouquet and were 
not in a fresh condition, which might account for failure to give results. 
One of the three maple experiments also gave no difference in time of 
wilting, but in the evening the decorticated stem revived, while the corti- 
cated did not, proving that the former took up water more readily than 
the latter. 
The following table gives the results of the experiments, the average 
temperature, length of cortex removed, time of wilting of corticated and 
decorticated, and the difference in time of wilting: 
Reith ais) eal «grote | cf cars Hetero NUMAE | Digeronse 
in em. Pan ee Corticated. Detertioated Beate 
Catalpaite.. sca sae was 2.5 20.5 22 30+ 8+ 
Muplicate)..ss..04--0000- 1.0 22.7 9+ 12+ 3+ 
Malay seo .0 eck: eer -eies 3.0 21.2 10 36 26 
Duplicates p22 24-05 <- 1.5 26.0 20 27.5 7.5 
Oakirk nade csuceoe! 15 29.0 9 13 4 
Duplicate 2 sos..e10cec- 2.0 30.0 | 7 13.5 6.5 
Mater C5: GAs esac 56 eb) 1.0 Des sik 45 64 | 19 
Muplicate) taacsecscec: 2.0 18.9 | 56 90 34 
Wild Cherry ........... 15 En | 15 22 7 
Muplicaterice cece eases 2G: 22.0 12+ 22 10 
Indian Mallow......... 2.0 24.0 7 ll 4 
Duplicate: . 2 -e-ccao- 1.0 26.7 8 10 2 
OSGi so xccirscisaerete ans B (NOW) Nooonecdancesee 40 Stil freshis||Sy-estasiieeee 
Bittersweet ............ 2.5 19.0 30 37 7 
Dwplvesiterssmssee ae 25 21.0 36 41 5 
Dai ae 2 sae eee aes 2.0 23.0 30 48 18 
Chrysanthemum....... 3.0 26.5 29 46 17 
Duplicateleacseeeeeeee 1555 24.0 33 39 6 
