No More Learning

When, in 1826, Karl Friedrich Naumann, one of the founders of
modern crystallography, sent his latest publication from Leipzig to Goethe, one of the most ambivalent thank-you notes ever written was
drafted in Weimar: "the important document sent to me by Your
Honor," wrote the aged Goethe with the usual           cer-
emony, "arrivedat a good moment, and I immediately read it with
great pleasure repeatedly up through page forty-five.