The once near-surface rocks will be relatively more oxidised, so that the fluids will tend to oxidise the overplate and, consequently will not precipitate silica but rather dissolve it.

Bolvs in Engliſh is called a morſell. It is a medicine laxatiue, in forme and faſhion it is meanely whole, and it is ſwallowed by little gobbets. […] ℞ Medulla Caſſiæ fiſtulæ [n]ewly drawne, ℥. j. or ʒ. x. the graines, that is, the kernels, of Barberies, ℈. ß and with Sugar roſet [sugar compounded with rose petals], make a bole.

But the Canterbury Bell, the Chimney Campanula (C . pyramidalis), and some few others, require more careful cultivation.

Oswald , broach the oldest wine-cask ; place the best mead , the richest morat , the most sparkling cyder , the most odoriferous pigment, upon the board