RECENT work carried out here supports some, but, we think, not all of the views recently expressed by Phillis and Mason1 regarding the composition and structure of cytoplasmic and vacuolar saps in plants. Copper beech leaves which contain anthocyan in the vacuoles of epidermal and palisade tissues were used and were carefully pressed between flat plates in the 50-ton testing machine of the Engineering Department through the kindness of Prof. C. H. Bulleid. Care was taken to avoid slipping of the leaves as suggested by Phillis and Mason.
Phillis and Mason, NATURE, 140, 370 (1937); Brit. Ass. Rep. 1938, p. 493.
Bennet-Clark, Greenwood and Barker, New Phytol., 35, 277 (1936).
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Biographical Memoirs of Fellows of the Royal Society (1977)
The Botanical Review (1947)
American Journal of Botany (1943)
New Phytologist (1940)