31 
(1) TEMPERATURES OF ABOUT 20° TO 21° c. 
Lepidium germinated in 88 hours under 21.1°; Linwm germinated 
in 36 hours under 21.1°; d/ays began to germinate in 42 hours under 
21.1°; Nigella germinated in 44 days under 21.1°; Sesamum germi- 
nated in about 33 hours under 21.1°; Sinapis germinated in 22 hours 
on the average under 21.1°; some 772folium seeds germinated in 42 
hours under 21.1°; /beris germinated in 2% days under 20.4°; only 
one Collomia seed germinated in 153 days under 19.6°; 2 Melon 
seeds out of 10 germinated in 68 hours under 19.4°. 
(x) TEMPERATURES FROM 24° To 25° c. 
Linum germinated in 38 hours under 25.05° ; J/ays, i seed in 12 ger- 
minated in 23 hours (half the seeds had germinated within 44 hours 
under 25.05°) ; Afelon, 2 seeds in 10 germinated in 44 hours, the others 
subsequently under 25.05°; Sesamum germinated in from 21 to 224 
hours under 25.05° (a second experiment gave 224 hours under 24.6°) ; 
Sinapis germinated in about 36 hours under 25.05°; 7rifolium ger- 
minated in 42 hours under 25.05°; Nigella and Iberis observations 
accidentally lost; Lepidium, 2 seeds in 10 germinated at the end of 
the sixth day, and the majority of the seeds between the sixth and 
seventh day under a mean temperature of 23.65°. A repetition gave 
38 or 39 hours under a temperature of 21.1°; a third repetition gave 
16 hours under a temperature of 26.5°, but which unfortunately ran 
up to 483° during a few hours. De Candolle concludes that there was 
some accident or mistake as to the first experiment, and therefore 
rejects it; probably the wrong seed was sown. He adopts for Lepid- 
zum 38 hours under 21.1° C. Collomia did not germinate until the 
twenty-seventh day, when 2 seeds sprouted under an average tem- 
perature of 21.5°. * 
(L) TEMPERATURES OF ABOUT 28° c. 
Two Lepidium seeds germinated in 39 hours, but the greater part 
not at all in 4 days; Linum, 1 seed germinated at the end of 24 days, 3 
seeds by the end of the third day, but the majority not at all; Mays, 1 
seed germinated in 36 hours, and the majority, with vigor, in 48 
hours; Jfelon, 1 seed germinated at the end of the third day, and the 
majority in 34 days; Sesamum germination began in 22 hours, and 
began to be abundant in 25 or 26 hours (a repetition gave 1 seed 
germinated in 31 hours under a temperature of 27.5° C.) ; Sinapis, 2 
seeds out of 10 germinated at the end of the third day, a third seed 
6 hours later, and the rest did not germinate; a few 7'rifolium seeds 
germinated at the end of the third day; Collomia and Nigella did not 
germinate in 8 days; a few 7riéfolium and Linum seeds germinated 
in 8 days under a temperature of 34°. 
