Sentence Examples


  • The rocks are probably of quartz, i.e.
  • Jacquerod and Perrot have found that quartz-glass is freely permeable to helium below a red-heat (Comet.
  • Gold is obtained chiefly from quartz reefs, but there are still some important alluvial deposits being worked.
  • The lodes occur in Silurian metamorphic micaceous schists, intruded by granite, porphyry and diorite, and traversed by numerous quartz reefs, some of which are gold-bearing.
  • He passed the oscillations to be detected through a fine wire or strip of gold leaf, and over this, but just not touching, suspended a loop of bismuth-antimony wire by a quartz fibre.