Here’s how to make a wooden lung from a 1952 Popular Mechanics: “Could a life have been saved in your community if a mechanical respirator had been at hand for immediate use? Often just a matter of minutes means the difference between life or death for a little child stricken with polio, or a victim of drowning or a paralyzing accident. Here’s a chance for every community to be ready at little expense for such emergencies. Members of clubs and civic organizations can do a great service by making one of these respirators and placing it in competent hands. Save a life — maybe your own.” Thanks Charlie! Link.