Practical physiology of plants / by Francis Darwin and E. Hamilton Acton.

  • Francis Darwin
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Practical physiology of plants / by Francis Darwin and E. Hamilton Acton. Source: Wellcome Collection.

    324/354 page 300
    800 The results of these three experiments should not differ by more than 1—2 p.c. Experiment No. II. Values obtained in three different sets of experiments. Leaves killed in the Leaves kUled iu the evening. early morning. Starch 3-4 2-5 p.c. 4-8 I-7 p.c. „ 4-0 3-2 p.c. As the figures indicate the result of these experiments varies greatly, and apparently in no regular way, but the greatest difference may be expected when a warm damp night has succeeded a clear bright day. Experiment No. III. Seedlings kept iu dark Grains. for three days. Starch 59-6 3-0 p.c. Chapter XV. p. 277. Organic acids etc. Qualitative. For ascertaining what organic acids are present, free and combined, beetroot juice may be examined, in which varying quantities of acetic, glycolic, malic, citric, tartaric, oxalic, succinic, and aconitic acids are commonly present. Quantitative. Values for old and young petioles of rhubarb. Experiment No. 1. Yoiuig Old Acidity. petioles. petioles. [Calculated as oxalic acid 0'6 2'2 p.c. H.CA]
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