Strether didn't, as he talked, absolutely follow himself; he only knew he was clutching his thread and that he held it, from moment to moment, a little tighter; his mere uninterruptedness, for five minutes, helped him to do that.

An aptness to learn is more observable in some children than in others.

[…]but when we examine the increase of this branch in part, we see, with Cassini, that each merithallus, or internode, grows principally by its lower part[…]

Coordinate term: h-system