The British Association
At the annual meeting of the British Association, several of the papers read were, as usual, of especial interest to physicians.
THE SIZE-FACTOR IN DEVELOPMENT
In his presidential address Prof. F. O. Bower, the botanist, discussed the size and form of living things. He quoted the first of the laws of evolution laid down by Lamarck: "Life by its intrinsic forces tends to increase the volume of every living body and to enlarge its parts up to a limit which it determines itself." In unicellular organisms, when a certain size had been reached, fission followed and the halves separated as new individuals, but in pluricellular organisms the products continued a communal life and by further division great size and complexity might be reached. Animals might be pictured as based on the mobile stage of a flagellate, and plants as based on the fixed stage. The whole organization