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5.

Doris is being very kind when she says that building the boat was good relaxation from work and study. Actually, it took the place of a little too much of the study. Until now the studying has been done in a very leisurely manner, without much plan - just tracking down, looking up, and thinking about things I didn't understand well. For example, consideration of what electromagnetic waves do in a cavity brought me to the wave equations themselves, which led to the equations from which they are derived, all the way back to the action of one charge on another, which is the foundation of everything electrical. This has been very pleasant and enlightening, but time is getting short and I will just have to cram before long.

I am looking forward eagerly to the trip to Washington.

Jack