Page:Aerial Flight - Volume 2 - Aerodonetics - Frederick Lanchester - 1908.djvu/266

§ 140 these influences were then subjected to rigorous theoretical investigation, with the results recorded. The investigations relating to lateral and directional stability followed shortly after, and that on rotative stability was undertaken owing to this peculiar form of instability having been accidentally encountered when making experiments with a quite different end in view. With the exception of a few embellishments and confirmatory experiments that have been added subsequently, the whole of the investigations were completed before the end of 1905.