Dear Luciana,

With reference to the instructive exchange between Roger Musson and Robert Reitherman on the subject of Charles F. Richter, (Letters, SRL 79-4, July/August 2008: 494) and about which work might have influenced his Elementary Seismology, I am reasonably certain that CFR had his German seismology directly from Beno Gutenberg. I was an assistant to Richter around the time that he wrote his book, and he was not really fluent in German.

Richter was originally a physicist, while August Sieberg (1875–1945) was primarily an architect who made some intelligent early observations on earthquake engineering. He was a professor of...

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