As a part of a general study of aircraft icing in the Alaskan-Aleutian area, six probability tables were constructed providing answers to the following three questions: First, given a temperature in a given place, altitude, and season, what is the probability of encountering visible moisture? Second, what is the probability of encountering aircraft ice at a fixed place, altitude, and season regardless of the presence or absence of visible moisture? Third, given a temperature in a given place, altitude, and season plus visible moisture, what is the probability of icing? Further, in the discussion of the results, possible explanations of the observed facts are advanced.
* Published with permission of the War Department.
† Mr. Serbein may be addressed at Collins, Iowa, and Mr. Taylor at 918 Park Ave., Cranston, R. I.