Is "Measure of the Universe" the book you're thinking of? Alternatively, chapter 8 of "Realm of Numbers" touches on logarithms, and "That's about the size of i

Is "Measure of the Universe" the book you're thinking of? Alternatively, chapter 8 of "Realm of Numbers" touches on logarithms, and "That's about the size of it" chapter from Assimov on Numbers" includes a log-scale table of animal weights (from blue whale at 8.08 to Rotifer at -8.22)