Sentence Examples


  • Thus a monochromatic image of the sun is built up on the fixed photographic plate.
  • They all squeezed into the front seat—the back seat was piled high with photographic equipment and camping gear.
  • He was distinguished as the discoverer of radioactivity, having found in 1896 that uranium at ordinary temperatures emits an invisible radiation which in many respects resembles Rntgen rays, and can affect a photographic plate after passing through thin plates of metal.
  • Photographic telescope was afterwards added, no fewer than 75,000 photographs had been obtained up to the beginning of 1901.
  • From 1847 to 1862 he was advising astronomer to the headquarters of the army and navy; chairman of the International Astronomical Congress from 1867-1878; acting president of the International Metric Commission in 1872; and president of the International Congress for a Photographic Survey of the Stars in 1887, in which year he was also made a privy councillor.