Volume 6: The Berlin Years: Writings, 1914-1917
Page171(199 of 654)
DOC. 13 PROOF OF AMPERE'S CURRENTS 171 [24]Emil Warburg (1846-1931) was Director of the Physikalisch-Technische Reichsanstalt; Ernst Gumlich (1859-1930) was Head of its Magnet Laboratory.
