Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] 100 BOTANY The young seedling in this case responded to the influence of the stimulus of light so as to grow out finally through the hole in the box into the open air. Make this experiment, and see if you get the same result. Vary the apparatus in any manner you can, and plant some other seeds or grains. This experiment shows that another factor besides gravity influ- ences the stem to grow upward. This growth of the stem to the

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