Sentence Examples

  • The oil film prevented 1 See Electrical Review, 1902, 51, p. 968.
  • Much skill is required to secure that the film when stripped shall remain undeformed.
  • Pure potassium is a silvery white metal tinged with blue; but on exposure to air it at once forms a film of oxide, and on prolonged exposure deliquesces into a solution of hydrate and carbonate.
  • They are at a dull red heat and are allowed to cool gradually in the air and become blackened by the formation on the surface of a film of oxide of copper.
  • For the sand-filtration of water on a large scale, in which the presence of a surface film containing zooglaea of bacteria is an essential feature, see Water Supply.

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