114 BOTANICAL GAZETTE [ FEBRUARY 
12. Effect of alternating dryness and moisture on the germination 
ones now in progress, but they show clearly that for some sects 
germination is quickened by thorough drying after a long periol 7 
of dampness. In most cases, after a small percentage of germ 
nation for the first one hundred days or more, drying for two 
weeks, followed by wetting, resulted in a germination of from) 
I5 to 54 per cent. ina few days. In the check pots, meanwhilé, 
the seeds either did not germinate, or only a small percentage 
did so. 7 
13. Experiments on the morphology of Arisema triphyllum: Vi © 
FESSOR Geo, F. Arxinson, Cornell University—Female, mat 
and neuter plants, the history of which was known by growing 
them in pots for one season, were potted, some in rich soil an 
others in poor soil, the object being to change them from male 
to female, etc., by varying amounts of nutriment. Male plats 
in rich soil were in one year changed to female, and large new 
plants in rich soil were changed to female. : 
but not from the nucellus, and probably arise from endos ‘ 
cells, which if true is a mode hitherto unknown, The liter 
