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heart-rot

back of typewritten page 9 (brightness -50),
Lyle Wendell Redverse Jackson (1900-1972), A Study of the Heart-Rot of Aspen (Populus Tremuloides Michx.) in Minnesota (M.S. thesis, University of Minnesota, 1927)
U Minnesota copy/scan, via google : link

landed here via search for “puttering” + “inauthor:jackson” through “1940”
more on text and its author at putterings 354
highlighted “word” is what OCR construed as “puttering.”
 

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