Images Dated 22nd August 2005

Gustav Robert Kirchhoff, German physicist

Gustav Robert Kirchhoff (1824-1887), German physicist. While he was still a student, Kirchhoff formulated what became known as Kirchhoff's Laws, used to determine electric current and electric potential at any point in a network of conductors. Kirchhoff also worked with Bunsen on atomic flame spectroscopy. In 1860 they demonstrated that when metal compounds are heated in a flame they emit spectral lines which are characteristic of the metal concerned. Kirchhoff discovered that dark spectral lines in the Sun's rays were absorption lines corresponding to elements found in the Sun's atmosphere. Engraving from Discoveries and Inventions of the Nineteenth Century (1898)

© SCIENCE PHOTO LIBRARY

The Panathinaiko or Panathenaic Stadium (Kallimarmaron). Pan

The Panathinaiko or Panathenaic Stadium (Kallimarmaron). During Classical times the stadium had wooden seating. I was uset to host the athletic portion of the Panathenaic Games. Was Built in 330 BC by Lykourgos, and it was restored in its present form betwenn 1896 and 1906. Athens. Central Greece. Attica. Eruope

© Thaliastock / Mary Evans

English Tea Party with the Prince of Conti at the Temple, 1766. Artist: Michel Barthelemy Ollivier

English Tea Party with the Prince of Conti at the Temple, 1766. The young Wolfgang Amadeus Mozart is seated at the clavichord at the left of the picture

© Art Media / Heritage-Images

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