Mast, Samuel Ottmar, 1871- · New York : J. Wiley & Sons · leaf 204
d. Orientation in light from two sources. — In the studyof orientation in light from two sources the larvae wereexposed on moist black paper just as in the preceding experi-ment, in a field of. light composed of two small horizontal 178 UGBT AND THE BEHAVIOR OP ORGAIflSifS beams, one from each of…
Light · Phototropism
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