239. What is the best method of strengthening the natural key?
By speaking and reading strong, animated passages in a small room.
240. How may low tones be acquired?
By continued practice in a lower key than the natural.
241. How may a high key be acquired?
In the same manner as a low key; by pitching the voice first a little higher than the natural, and mastering that thoroughly, then still higher and higher.
242. What is meant by Rotundity of the voice?
That peculiar form of tone which the Romans called "Ore rotundo," which signifies "Round mouth."
243. In what kind of sentences is the Rotundity of the voice exemplified?
In the hailing of vessels, and is used especially by sailors and officers.