Sorrow has the fortunate peculiarity that it preys upon itself.
It dies of starvation. Since it is essentially an interruption of habits, it can be replaced by new habits. Constituting, as it does, a void, it is soon filled up by a real horror vacuum.
I just kind of conjured them up out of my subconscious and put them in order of ascending peculiarity.
The most common and most important result of them is that the nature and size of the effect on corresponding series of different elements are largely an expression of the peculiarity of their atomic structure - or, at least, of the structure of the surface.