Report no. 155 (Preliminary)Dated April 19, 1943.Summary: "Purpose: to propose an alteration of the elctrical circuit in the American F-1 suit which will provide: connections for the respective use of either British or American electrically heated…
Date for this item was determined by a Dahlberg research volunteer to be 1918. His source was "Mavericks of the Sky: the first daring pilots of the U.S. Air Mail" by Barry Rosenberg, and Catherine Macaulay. Notes on top of page 282.