Originally published in 1945, this book was principally intended as a science book for schools to aid and assist classroom study and to provide practical exercises to follow up and consolidate theory. Topics are covered through multivariate analyses and range from 'Constellations' to 'Time' to 'The law of gravitation', whilst relevant parts of the theory of light are also discussed, enabling the principles of the telescope, spectroscope and atmospheric refraction to be fully understood. Notably, questions for self-study are also included as well as multiple diagrams and photographs. Written from a historical, mathematical and experimental standpoint, this book provides an introductory treatment of astronomy and will be of great value to researchers and scholars in the field and to anyone with an interest in the history of education.