The Wheel of Life
JAMES RITCHIE , D.Sc.
(Regius Professor of Natural History in the University of Aberdeen)
This is the first talk in a new series by Professor James Ritchie , and he is to show how animals and plants live. All animals, ultimately, obtain their food from plants, and plants build up the stuffs which all animals devour by making use of the energy radiated by the sun. He pictures living matter as a mill-wheel kept in constant circulation by the stream of light from the sun. Professor Ritchie is to give ten talks in this series for Discussion Groups, and a list of useful books to read while the series goes on was given in the Talks Supplement in The Listener for April i.