Mast, Samuel Ottmar, 1871- · New York : J. Wiley & Sons · leaf 91
Fio. J. Trodnitii of nhndnw of a plumiilo of com iihowtnR it> reaction In IlKht of(radcd Intenilty, ihrvc-fourtht natural nlzc. I. Croiw Mcllun uf two.beams ofIJKht at uscU in the npcrimcnt; intcntlty at a and a, zero; at h and h, too ca, m.;I, >t i, 4> $• 6, 7, successive positions of…
Light · Phototropism
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
