Chapter X. is principally an account of experimental method, and includes many notes, observations, and hints that will be found of value to those who are tempted to take up the experimental study of aerial flight.
The terminological innovations adopted in the present work are given in the glossary following Chapter X., in which are included new words or words bearing a special or restricted meaning, as employed in both Vols. I. and II. The present glossary is thus, in great part, a repetition of that previously given.
Numerical work has been done by the aid of an ordinary 25 cm, slide rule, with a liability to error of about one-fifth of one per cent., an amount which is quite unimportant.
It is again with very great pleasure that the author tenders his thanks to Mr. P. L. Gray for his assistance in the reading and correction of the proof sheets.
May, 1908.
