First published in 1931, as the second edition of a 1919 original, this book forms the final part of a four-volume work written by the renowned British meteorologist Napier Shaw (1854–1945). The text focuses on the meteorological calculus, attempting to provide the reader with a grounding in the fundamental aspects of the area. Numerous illustrative figures are included, together with extensive textual notes. This book will be of value to anyone with an interest in meteorology and the history of science.