Editorial note — Chapter VIII · Respiration.

“The first effect of a cigar upon any one demonstrates that tobacco can poison by its smoke and through the lungs.”—London Lancet. “The action of the heart and lungs is impaired by the influence of the narcotic on the nervous system, but a morbid state of the larynx, trachea, and lungs results from the direct action of the smoke.”—Dr. Laycock, Professor of Medicine in the University of Edinburgh.