Originally published in the early 1930s. The book explains what invention really is, and the extent to which actual creation plays a part in it. It discusses the inventor himself and the intelligence and peculiar qualities which make him an inventor. Contents include: What is Invention? - The Inventor - The Practice of Invention - Financing Inventions - Direction of Inventive Effort - Mechanical Invention - Electrical Invention - Chemical Invention - Psychological Invention - Transformation of Energy - Biological Invention - Patent Laws - etc. With descriptive illustrations.