264 BOTANICAL GAZETTE 
more extensively with Zea mays (popcorn), Brassica alba, and 
Raphanus sativus. While the general results could be given ina 
few words, yet, to afford the reader opportunity to —s 
evidence, the following tables are given. 
TABLE I. ce 
EXPERIMENTS WITH ZEA MAYs (popcorn). Temperature in air 24°. 
he Flow per minute After 93{ hours After 18 hours 
I a 
8 seedlings & 40 2500 to 500°™ 8 roots =0 8 roots = 0 
| 
j IL 1630 to 1300™ | 3 roots =0° 
9 seedlings & 26 | I140to 325 6 roots = +15° to 40 
i 
rooos™ 
oO 
= +40 
I root 
°o 
I root = gy 
“The results recorded in the foregoing table wer | 
th seedlings of the same planting; the experimen 
ed on at the same time, at the same temp 
The external conditions, tine 
possible. : 
An exami ation of my notes on experime ee 
ious times _ during the past three years eo 
va has varied i in its ne mane mene to the 
