The first example of this design, nicknamed " Old Number One ", is currently on display at the Smithsonian Institution in Washington, DC . Emerson continued to make improvements to the iron lung, adding a quick opening and closing function, an improved pressure gauge, and emergency hand operation.
42.
While the two are not actually making the same edits, I suspect that this is a left hand / right hand operation : Knowitallfortoday is very concerned, in their edits, to remove certain band members from the article, especially, it seems, Pieter Nooten-- this is one of the many times they edited him out.
