Atoms are not Watermelons

Posted by jns on August 29, 2005

A few days back I finished reading How to Write: Advice and Relfections, by Richard Rhodes. Although I’m frequently drawn to read them, books about writing are rarely satisfying, interesting, or useful. Rhodes’ book managed all three, and I can recommend it.

Here are three passages I made note of as I read that I wanted to copy into my blog, which also serves as my commonplace book.

People lost in a wilderness have been known to find their way out guided by the wrong map; orienting is apparently a function only loosely tied to locality.¹ [p. 30]

Not everyone liked the arrangement.² Dixie Lee Ray, the eccentric former chair of the U.S. Atomic Energy Commission and governor of the state of Washington, reviewed The Making of the Atomic Bomb for the Washington Times. My war scenes were too graphic, Dr. Ray complained. Everyone knows that war is terrible; why go on about it? Worse, she wrote, the book jumps around. [p. 108, italics in original]

A less global structural problem was deciding at what level to pitch scientific explanation. I’d read enough popular science to be impatient with explanation that depended on fanciful analogies. Besides being condescending, comparing an atom to a watermelon wastes half the analogy. Fortunately, nuclear physics is largely an experimental science. Reading through some of the classic papers in the field, I realized that I could explain a result clearly and simply by describing the physical experiment that produced it: a brass box, the air evacuated, a source of radiation in the box in the form of a vial of radon gas, and so on. Then I and the reader could visualize a process in terms of the manipulation of real laboratory objects, not watermelons, just as the experimenters themselves did, and could absorb the culture of scientific work at the same time–the throb of the vacuum pump, the smell of its oil. [pp. 109--110]

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¹He had been discussing memory and the occasional difficulty of coming up with just the right word. He discusses the use of dictionaries and thesauruses to help, and how he frequently finds words that were “just right” but weren’t what he was looking for.

²“The arrangement”, that is, of his masterly The Making of the Atomic Bomb, in which he uses historical narrative to follow several threads in science and politics, carrying each one to some stopping point before going to previous times to pick up a thread put down for awhile.