= First published Paris, 1819. Cf. PMM 280; Dibner 129; Norman Library 1253; Bibl. Walleriana 5491 and Garrison/ Morton 2673: "Auscultation in the instrumental sense dates from Laennec's invention of the stethoscope (at first merely a roll of stiff paper) with a view to amplifying the sound of the heart's action. The publication of this book revolutionized the study of disease of the thoracic organs. The work illustrates his wooden stethoscope, which could be purchased from the publishers, and which was advertised for sale on the original printed wrappers of the first edition (...)."