Toil and/Trouble Available to Purchase

WE have frequently in the past given expression to our belief that one of the more useful functions AIRCRAFT ENGINEERING can perform is to publish from time to time articles summarizing the position and surveying the existing state of knowledge on some subject of general interest. The difficulty, of course, always is to find someone with the time, as well as the inclination, to step back from his day‐to‐day routine investigations to prepare such a paper. Certainly that has always been the obstacle we have met when we have formed the opinion that the time has arrived when a survey on such broad lines of this or that matter would be of interest; apart from the view that a sufficient state of finality has not been attained for the process to be possible, pre‐supposing that such a condition ever is reached in any branch of knowledge.