Originally published in 1938, this book contains the text of ten lectures arranged by the History of Science Committee at the University of Cambridge in 1936. Each speaker covered a different aspect of scientific endeavour, focussing mostly on advances made in the period between 1895 and 1935 in fields such as parasitology, radioactivity, astronomy and evolution theory. The lecturers include such scientific notables as Lord Rutherford, Professor George Nuttall and Sir William Dampier, chosen for the fact that they had ‘made fundamental contributions to science’ in the previous forty years. This book will be of value to anyone with an interest in the history of science.