Both Uses of
efficacy
in
Dr. Jekyll and Mr. Hyde
- The evil side of my nature, to which I had now transferred the stamping efficacy, was less robust and less developed than the good which I had just deposed.†
p. 87.8 *efficacy = effectiveness
- You will learn from Poole how I have had London ransacked; it was in vain; and I am now persuaded that my first supply was impure, and that it was that unknown impurity which lent efficacy to the draught.†
p. 107.8
Definition:
effectiveness (the ability to produce a desired result)