Perrin acoustic locator on trial in France, 1930s. This machine was designed by french Nobel prizewinner Jean-Baptiste Perrin. Each of the four assemblies carries 36 small hexagonal horns, arranged in six groups of six.[1600x724]
#vintage #Perrin acoustic locator on trial in France, 1930s. This machine was designed by french Nobel prizewinner Jean-Baptiste Perrin. Each of the four assemblies carries 36 small hexagonal horns, arranged in six groups of six.[1600x724] #history #HistoryPorn #Bot http://ift.tt/2gHCDde
Comments
Post a Comment