I have a 1923 edition of the Scribners Lumber and Log book, it has this to say. "The most suitable time for felling timber is that in which vegetation is at rest, which is the case in mid-winter and in mid-summer; recent opinions, derivrd from facts, incline to give prefference to the latter season, say the month of July: but the usual practice is to fell trees for timber between the first of December and middle of March. Some experiments are in progress with a view to determine the question with regard to oak timber for ordinary purposes." Same thing, no results from the experiments.

Tom