EditorialDr. Monica Avogadri teaches a course to train medical workers on ventilating techniques for COVID-19 patients in the chapel of Pesenti Fenaroli Hospital in Alzano Lombardo, Italy, Sept. 21, 2020. (Fabio Bucciarelli/The New York Times)
EditorialModel of a Ventilating Shaft and Portlight, Model of an air and light tube. Model of a part of a ship's wall, on a groundboard. The ship's wall consists of the skin, two wooden parts and the weight, the space between the wooden parts is the air duct, p...