Animal magnetism or, Mesmerism : its history, phenomena, and present condition : containing practical instructions and the latest discoveries in the science

This book surveys the history and theory of animal magnetism, then presents the phenomena associated with mesmerism along with practical instruction. It is historically important as part of the 19th-century effort to systematize mesmerism as a legitimate science, and it likely includes demonstrations, methods, and contemporary interpretations.

William Lang is an obscure nineteenth-century figure associated in library records with esoteric or occult writing, though readily verifiable biographical detail is limited. He appears in catalogues as an author connected to the wider occult-literary milieu of the period.