"E=mc^2, the most urgent problem of our time" in "Science Illustrated".

EINSTEIN, Albert. "E=mc^2, the most urgent problem of our time" in "Science Illustrated", April 1946, issue 1/1, 128pp. The Einstein appears on pp 16-17. Original wrappers. Near-fine copy. Uncommon. [++] The pics show the small bits of nicks and abrasions to the cover of this issue, which are really very minor the pics here accentuate these flaws and I guarantee that the issue looks better than this in person. [++] This seems like an easy and probably unnecessary non-trivia question, but it isn't. When was the first time that the equation that every school child knows E=mc^2 appears in print in this exact form under Einstein's name? Folks naturally say 1905 and 1915 and 1916 and 1919 and 1922 (etc.), but that's not quite right. Even photos showing Einstein lecturing at a blackboard purporting to show the first public appearance of the formula with Einstein are not correct. The very first time that E=mc^2 (in this exact form) appearing under Einstein's name doesn't make its appearance until very late in the game, in the inaugural issue of "Science Illustrated" in April 1946. (E=mc^2 appears in the title and in the text on pg 17, first column, 11 lines from the bottom.) Sounds a bit meshugge, but so far as I can tell it isn't, and that this is it. (I have an email to Gerald Holton asking this question, and the great man and Einstein (among many other things) scholar just flat-out said that he didn't know, which is a fundamental statement in the beginning of building knowledge.) If you know otherwise, please let me know.…