Sentence Examples

  • In 1861 Sir William Crookes detected thallium (named from the Gr.
  • Rubidium, caesium, thallium, indium and gallium were first discovered by means of this instrument; the study of the rare earths is greatly facilitated, and the composition of the heavenly bodies alone determinable by it.
  • 8 shows the variation of refractive index of mixed crystals of potash alum and thallium alum with variation in composition.
  • In 1861, while conducting a spectroscopic examination of the residue left in the manufacture of sulphuric acid, he observed a bright green line which had not been noticed previously, and by following up the indication thus given he succeeded in isolating a new element, thallium, a specimen of which was shown in public for the first time at the exhibition of 1862.
  • Later Maes of Clichy (France) exhibited some " zinc crown " glass in small plates of optical quality at the London Exhibition of 1851; and another French glass-maker, Lamy, produced a dense thallium glass in 1867.

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