Note 2 — [212] CHAPTER I [VIII]1
Reading edition
It is well known that water, in which carbonic acid is dissolved, has the power of holding in solution a portion of lime, somewhat proportioned in quantity to the acid. In this instance, the water no sooner comes in contact with the atmosphere than it parts with a portion of its fixed air, consequently loses the power of holding in solution the lime which is immediately deposited. The lime may perhaps, in this instance, be derived from the cement of the sand-rock.—James.