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Updated: June 18, 2025
By this time the water contains half per cent, of acid, which Professor Gazzeri considered far too little to repay the expense of extracting it. From the last lagoon it is conveyed into reservoirs, whence again, after having remained quiescent a few hours, for what purpose is not stated, it passes into the evaporating pans.
As late, however, as 1801, in consequence of the failure of numerous experiments, Professor Gazzeri arrived at the conclusion that the quantity of acid contained in the water of the lagoons was too small to render the working of them profitable. But this opinion was based on the old practice of attempting the extracting the mineral by the use of charcoal furnaces.
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