CHAPTER IV.. The Effects of Heat on the Leaves.

THE EFFECTS OF HEAT ON THE LEAVES. Nature of the experiments—Effects of boiling water—Warm water causes rapid inflection— Water at a higher temperature does not cause immediate inflection, but does not kill the leaves, as shown by their subsequent re-expansion and by the aggregation of the protoplasm— A still higher temperature kills the leaves and coagulates the albuminous contents of the glands.