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Then we studied geotropism by observing how our plant grew toward the ceiling, even after we tipped the plant on its side for a few days.

The relations between vegetable and animal geotropism have been more recently investigated by J. Loeb.

Nevertheless, we fully admit that the weight of the part, as well as geotropism, etc., sometimes come into play.

Thus I am now observing something about geotropism, and I had no idea a few weeks ago that this would have been necessary.

It must also be granted that geotropism has a bearing on the problem, since all plants twine upwards, and cannot twine along a horizontal support.