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Hal Harris's picture

The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery

Mon, 08/01/2005 - 01:00 -- Hal Harris

Gurstelle also wrote "Building Bots: Designing and Building Warrior Robots", but I haven't read that one. "Catapult" is definitely in the spirit of "build it yourself", that I like to encourage here and also in "The Cost-Effective Teacher" feature in the print Journal.

Hal Harris's picture

The Curious Life of Robert Hooke: The Man Who Measured London

Wed, 09/01/2004 - 01:00 -- Hal Harris

Robert Hooke's name is familiar to most of us only because of "Hooke's Law", f = - kx, which describes the potential for a harmonic oscillator. I became aware of some of the other contributions of this remarkable man by reading one of Lisa Jardine's previous books, "Ingenious Pursuits", which was my pick for May, 2000.

Hal Harris's picture

Galileo's Finger: The Ten Great Ideas of Science

Sat, 05/01/2004 - 01:00 -- Hal Harris

What would you say are the greatest scientific ideas that mankind has discovered? Most of us chemists would say that the notion that matter consists of atoms would have to be one of them, and physical chemist Peter Atkins does not disappoint us on that score. He also treads ground familiar to us when he describes entropy and energy, and evolution and DNA.

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