Sentence Examples


  • The oil film prevented 1 See Electrical Review, 1902, 51, p. 968.
  • The metallic film is tested with 20% nitric acid and with bleaching-powder solution.
  • The black films of tin, lead and cadmium dissolve at once in the acid, the lead film being also soluble in bleaching-powder.
  • The oxide films of antimony, arsenic, tin and bismuth are white, that of bismuth slightly yellowish; lead yields a very pale yellow film, and cadmium a brown one; mercury yields no oxide film.
  • Window glass exposed to alkaline vapours often shows a thin iridescent surface film which is supposed to be due to crystallization; the same change is found in pieces of Roman glass which have been dug out of the ruins of Pompeii.
 

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