Sitting beside the hearth, with Fred and his mother planning what they would do, and Lily curled up in my lap, her pure, sweet face nestled close to mine, her sightless eyes remindless of the sorrow we had known, I came near sharing with her the joy I felt in being able to remove her to more favorable quarters.

Heterosynaptic, long-term plastic changes can be induced in hippocampal and neocortical neurons by intracellular tetanization—bursts of spikes evoked by short, depolarizing pulses applied through the recording electrode.

Ladies and gentlemen, he said, adopting an Englishy voice, this is not the limit of their benevolence.

In the set of 3-adic numbers, the closed ball of radius 1/3 centered at 1, call it B, is the set x|∃n∈ℤ.,x=3n+1. This closed ball partitions into exactly three smaller closed balls of radius 1/9: x|∃n∈ℤ.,x=1+9n, x|∃n∈ℤ.,x=4+9n, and x|∃n∈ℤ.,x=7+9n. Then each of those balls partitions into exactly 3 smaller closed balls of radius 1/27, and the sub-partitioning can be continued indefinitely, in a fractal manner. Likewise, going upwards in the hierarchy, B is part of the closed ball of radius 1 centered at 1, namely, the set of integers. Two other closed balls of radius 1 are centered at 1/3 and 2/3, and all three closed balls of radius 1 form a closed ball of radius 3, x|∃n∈ℤ.,x=1+n/3, which is one out of three closed balls forming a closed ball of radius 9, and so on.