Preface; 1. Memoir of Sir George Darwin by his brother Sir Francis Darwin; 2. The scientific work of Sir George Darwin by Professor E. W. Brown; 3. Inaugural lecture; 4. Introduction to dynamical astronomy; 5. Lectures on Hill's lunar theory; 6. On librating planets and on a new family of periodic orbits; 7. Address to the International Congress of mathematicians at Cambridge in 1912; Index.