IF the punctum vegetationis of a root is removed by a transverse section, the root loses more or less completely the power of curving geotropically downwards when placed in a horizontal position. This ...

Meet Andy Sachs. A million girls would kill to have her job. She's not one of them.

I HAVE just been listening to a discussion, at the Zoological Laboratory, arising from some interesting observations by Mr. G. L. Clarke on the tropisms of Daphnia. A question was asked as to the ...