Three illustrations from Lectures on Ventilation—Being a Course Delivered in the Franklin Institute of Philadelphia during the winter of 1866-6, by Lewis W. Leeds, Special Agent of the Quartermaster General for the Ventilation of Government Hospitals during the War and Consulting Engineer of Ventilation and Heating for the US Treasury Department. “Man’s own breath is his greatest enemy.” JOHN WILEY & SON, PUBLISHERS, 1869.
(Suggested by the Public Domain Review.)
