X-ray manual : U.S. Army
A field manual on radiography issued in 1917 by the U.S. Army Surgeon-General's Office with the American Roentgen Ray Society, printed in New York for military medical officers operating X-ray equipment. Line diagrams show wiring circuits for Coolidge and Snook machines, tube and rheostat symbols, geometric projection schemes for locating foreign bodies, and hatched cross-sections; useful for technical schematic linework.
