The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 376
the product obtained is by no means proportionate to therichness of the ore. By this improved process the employment of retorts is entirelydispensed with, and the fuel and labour are greatly economised;the operation is also completely independent of the skill of theworkman or attendant; and,… … inrj!? Fig. I. The principal feature of the invention consists in the reductionof roasted blend-ore (native sulphuret of zinc), and of the car-bonates, oxides, or silicates of zinc, and also of the sulphurets andoxides of lead, by the action of the reducing gases of a blast fur- 3U THE CIVIL…
Architecture · Civil engineering · Science
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