The Action of Plants on a Photographic Plate in the Dark . Russell. Roy. Soc. Proc, B. vol, 78, Plate 20. i^n iii ^PS ^^^p:; [ ^^Hj^^^ 1^^^^^^^^^^^^ .: , ? liliiiH

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Keywords: ., bookcentury1900, bookdecade1900, bookidphiltrans062, bookyear1906