On page 235, "necessity for fright" was replaced with "necessity for flight."
On page 241, "in the labratory" was replaced with "in the laboratory".
On page 250, "chysanthemums" was replaced with "chrysanthemums".
On page 251, "hurring" was replaced with "hurrying".
On page 251, "Prades's" was replaced with "Pradès's".