Suppose that we add such a quantity of silver nitrate as to double the amount of argention after equilibrium has been attained.

[A]s Mark, with all his vigilance, was unable to keep them [visitors] from the door; he resolved to go to bed—not that he felt at all sure of bed being any protection, but that he might not leave a forlorn hope untried.

they are also fluted on their under edges, and sunk on their upper sides, projecting about two inches, in general, beyond the ashlaring

We tend to think of the seafloor a few kilometres down as a flat plain. In fact, about two-thirds of this “abyssal” seabed is made up of gentle rolling hills a few hundred metres high, says Jennifer Durden at the University of Southampton, UK.