Note 391 — Chapter XI
Reading edition
Some of this molluskite has, at my request, been analyzed by Mr. Rigg, who obliged me with the following remarks:—"After removing the lime by means of hydrochloric acid from ten grains of this substance, there remained 1.2 grain of dark powder, which gave, by analysis with oxide of copper, .16 of a cubic inch of carbonic acid, and a small portion of nitrogen. On subjecting to the same kind of analysis two grains of the darker body, without previously acting upon it by any acid, .054 of a cubic inch of carbonic acid was obtained; so that from these results there is no doubt but the darker portion of the molluskite contains about .35 per cent, of its weight of carbon in an organized state."