Sentence Examples


  • Sawdust, slabs, stumps and large quantities of logs are wasted.
  • In this process cellulose (in the form of sawdust) is made into a stiff paste with a mixture of strong caustic potash and soda solution and heated in flat iron pans to 20o-250 C. The somewhat dark-coloured mass is lixiviated with a small amount of warm water in order to remove excess of alkali, the residual alkaline oxalates converted into insoluble calcium oxalate by boiling with milk of lime, the lime salt separated, and decomposed by means of sulphuric acid.
  • It is found that the sawdust obtained from soft woods is the best material for use in this process.
  • The supernatant liquid is led into settling tanks, where a further amount of "gold is deposited, r and is then filtered through sawdust or sand, the sawdust being afterwards burnt and the gold separated from the ashes and the sand treated in the chloridizing vat.
  • The use of non-foodstuffs, or cellulosic materials, such as grasses, reeds, straws, peat, waste wood, sawdust, etc., is not yet possible, for, although research work is in progress to discover a process that could be worked on a commercial basis in those regions where such materials exist in sufficient abundance, it has not so far led to any definite results.

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