Maybe some day I'll put some class notes up here.

Here is a little comment diagnosing a physics textbook error on elastica.

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Here are a few links to things:

• EPINET   a menagerie of hyperbolic tilings and crystalline networks
• EqWorld   a ridiculously useful website
• Gordon Judd   mechanics of fly fishing
• KMODDL   Reuleaux Kinematic Mechanisms Collection
• Lariat Chain   by Norman Tuck
• Mechanisms   by Pafnuty Tchebyshev
• morphometry.org   Minkowski tensors
• Rinus Roelofs   modular sculpture
• String shooter/launcher   by Bruce Yeany
• sunsight to sunclipse   whirling skirt on a bike wheel by Gustav Düsing