Mathematical Theory of Turbulence

"I do not think at all that I am able to present here any procedure of investiga­ tion that was not perceived long ago by aZl men of talent; and I do not promise at all that you can find here anything quite new of this kind. But I shall take pains to state in clear words the pules and ways of investigation which are followed by able men, who in most cases are not even conscious of follow­ ing them...