"A System of Practical Medicine" by American authors is a scientific publication written in the late 19th century. This multi-volume work provides an extensive overview of various medical conditions, focusing particularly on the diseases of the respiratory, circulatory, and hematopoietic systems. The book consolidates knowledge from numerous American medical practitioners and aims to serve as a comprehensive reference for medical professionals of the time. The opening of this volume begins with the section on laryngoscopy and rhinoscopy, detailing the history and evolution of the instruments used for examining the larynx and nasal cavities. It highlights the development of the laryngoscope and rhinoscope, tracing their origins from early metal mirrors to the modern instruments employed in medical practice. The text emphasizes the importance of proper technique, including patient positioning and illumination methods, to ensure a successful examination, thus setting the foundation for understanding further medical discussions in the text related to respiratory illnesses. (This is an automatically generated summary.)

A system of practical medicine. By American authors. Vol. 3 : $b Diseases of the respiratory, circulatory, and hæmatopoietic systems