I normally don't care what I get for Christmas, but this year's was a very unexpected surprise.(adsbygoogle = window.adsbygoogle || []).push({});

I got a Pickett N4-ES Vector Hyperbolic Dual Base Slide Rule.

This is listed as having 34 scales, but that's a little deceiving. It has a 30 inch cube root scale (that's 3 scales), a 20 inch square root scale (2 scales), and an 80 inch log-log scale and the log base 10 scale. It has a 20" hyperbolic sine and tangent scales, plus the normal 20" tangent, sine, and small angle sine scales, C (one each side), D (one each side), CF, DF, CF/M, and DF/M scales, plus the reciprical CI, CIF and DI scales. It's aluminum with a plastic lined leather case in Pickett's famous eye-saver yellow.

Mine's a little unusual in that it only has 33 scales. It's missing the Ln scale from 0 to 2.3 and it's also missing the 1959 copyright notice. I think this one was a very early version.

One of the most sophisticated slide rules ever made and my wife picked it up at a thrift store for $16. The only restoration it needed was cleaning off the glue from a price tag that had been stuck directly on the slide rule. :rofl:

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# What did you get for Christmas?

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