and 2. downwards to the fire, were considered to have suffered the M, and the products are led into it by the conduit, N, until The column, B, was incased as shown in Figs. 3and4. In most severe test, but neither of these strips showed indica- the acid is saturated. The noxious vapors engendered… … ys Ls The columns, A and B, were fixed erect on the ground had been subjected to the most extreme heat, and boiling, about 4 feet apart, and their caps and bases were entirely in- them with water, unaltered gypsum (sulphate of calcium or closed by the concrete. sulphate of lime) was extracted.…
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