Water, drops of, not causing inflection in Drosera, 35 —, its power in causing aggregation in Drosera, 52 —, its power in causing inflection in Drosera, 139 — and various solutions, effects of, on subsequent action of ammonia, 213
Wilkinson, Rev., on Utricularia, 398
Z.
Ziegler, his statements with respect to Drosera, 23 —, experiments by cutting vessels of Drosera, 249
Zinc chloride, action on Drosera, 184