Folder: Prothesics
Dutch personal horns. Rotating acoustic listening device developed for the Dutch army as part of air defense systems research between World Wars I and II, 1930s.
German acoustic/optical locator, 1917. A junior officer and an NCO from an unidentified Feldartillerie regiment wearing combined acoustic/optical locating apparatus.
Acoustic listening device developed for the Dutch army as part of air defense systems research between World Wars I and II.
“What to do for a splitting backache…automated caveman gets a rear-end drive”, Popular Science, January 1964
New Mechanical Chiropractor, Modern Mechanix, December 1932 WITH a machine like the one shown below in your home, there’s no longer any excuse for headaches. At least, that is…
