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Updated: May 6, 2025
I was confined to my bed, and it was then that my mind, dwelling for hours together on the experiment about to be made, suggested that instead of trying to decarburise the granulated metal by forcing the air down the vertical pipe among the pieces of iron, the air would act much more energetically and more rapidly if I first melted the iron in the crucible, and forced the air down the pipe below the surface of the fluid metal, and thus burn out the carbon and silicum which it contained.
I had become quite skilful in preparing this /Liquor Silicum/; the fine white flints which are found in the Main furnished a perfect material for it: and I was not wanting in the other requisites, nor in diligence.
All the specimens which I have seen consist of incrustation, some purely siliceous, some calcareous, and others mixed of those two, more or less. Dr Black has been analysing the water; and he finds in it siliceous matter dissolved by an alkaline substance, in the manner of liquor silicum . My conjecture has thus been verified.
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