Puns, math, references to Bob Ross, the outdoors, and a really kind teacher: That’s the combination school children deserve, dang it! And yet it almost never happens. But that’s OK; the world’s still ...

You may find this hard to believe, but there are people still alive today who once did their mathematical calculations by sliding sticks back and forth. No keypads, no batteries, no LEDs. Just sticks.

(1) THE type and diagrams in this book are models of elegance and excellence; evidently no pains have been spared in making both as clear and perfect as possible, and the logarithm tables at the end ...