Sentence Examples

  • Kiihne (D.R.P. 147,871) described a process in which external heating is not necessary, a mixture of aluminium turnings, sulphur and boric acid being ignited by a hot iron rod, the resulting aluminium sulphide, formed as a by-product, being decomposed by water.
  • It is usually to be met with in the form of turnings or raspings, the former being obtained in the maufacture of the "bitter cups" which are made of this wood.
  • The precipitation is effected by zinc in the form of bright turnings, or coated with lead, or by electrolysis.
  • The gold and other metals are precipitated on the under surfaces of the turnings and fall to the bottom of the compartment as a black slime.
  • The slime is cleaned out fortnightly or monthly, the zinc turnings being cleaned by rubbing and the supernatant liquor allowed to settle in the precipitating boxes or in separate vessels.

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