Push a button and the ballerina's tutu becomes the wings of a butterfly that flutter along two arcs of numerals.

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If I roll them evenly, this disproportionate edge pressure remains, and at a high speed the skis bend into two differently shaped arcs, rather than ideally parallel twins, meaning they are making two different turns of different radii and different speeds, and occasionally this results in a seemingly unexplainable fall.

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Then have a look at the two charts which illustrate the arcs of Woods's performance in the World Golf Rankings and the DJIA the past 10 years.

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Critics complain that no one makes anything in Silicon Valley anymore, a two-decade-long gripe that arcs from Apple s decision to shut down its Fremont, California factory in 1992 through Intel s shuttering of its last Silicon Valley chip-fabrication plant in 2009.

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