Fechner's double sound pendulum for testing aural discrimination
1898-1908
Siemens & Halske AG radio valve, 1884-1936
1884-1936
Siemens and Halske's ABC Telegraph used in Russia
1850-1897
Morning after contraceptive pills, Germany, 1986
1986
Railway signalling bell by Siemens and Halske
William Thomson's marine mirror galvanometer, 1850-1900
1854
Earth globe from orrery planetary model
1867-1900
Coin Commemorating Zeppelin world flight, 1929
1930
Medal for Airship Race 10-11 October 1908 in Berlin
1908
Portrait, photogravure, Herbert Spencer / Photographische Gesellschaft Berlin
1910-1919
Ludwig
1910-1919
Portrait, photogravure, Tycho Brahe / Photographische Gesellschaft Berlin
1910-1919
K E von Baer
1910-1919
Portrait, photogravure, William Herschel (1738-1822)
1910-1919
Portrait, photogravure, Dmitrii Ivanovich Mendelejeu / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Hermann von Helmholtz / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Carl von Linne [Linnaeus] / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Ernst Heinrich Haekel / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Otto von Guericke / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Leonardo da Vinci / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, John Lubbock
1910-1919
Portrait, photogravure, Max Planck / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Christian Friedrich Schonbein / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Wilhelm Konrad Roentgen / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Siemens / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Emil Du Bois-Reymond / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, William Thomson
1910-1919
Portrait, photogravure, Emil Fischer / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Eduard Suess / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Charles Darwin / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Walther Hermann Nernst / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Eilhard Mitscherlich / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Richard Owen / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Wilhelm Ostwald / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Allesandro Volta / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Friedrich Koenig / Photographische Gesellschaft Berlin
1910-1919
Portrait, photogravure, Immanuel Kant / Photographische Gesellschaft Berlin
1910-1919
Photogravure of James Clerk Maxwell
1910-1919
Photo matrix of a letter 'S' from a Diatronic "S" photosetting machine
1970-1985
Physiological Mercury Thermometer, 1876
1876
Physiological Mercury Thermometer, 1876
1876
Ear Mercury Thermometer, 1876
1876
Helmholtz's quadrant electrometer
1876
Burette with glass stopcock
1801-1876
Burette with glass stopcock, graduated to 30 cc.
1876
Wollaston type reflecting goniometer on marble base
Hamann Elma electric calculating machine
1950-1960
Dissecting microscope, c. 1750
1745-1755
10 glass cubes for demonstrating double refraction
1885
Cystoscopic periscope
1914