On Fri, 24 Feb 2006, Gerhard Fiedler wrote:

> The one thing I have never been able to figure out of the "advanced stuff"
> is how you measure the time a coin takes to fall down from the height of a
> doorway with a slide rule. The manuals of all rules I've seen only refer to
> this as one of the "advanced techniques" ...

You drop the coin, bend down to pick it up, and as you straighten up 
measure the door height using the slide rule. Then you can express the 
door length in sliderules.

Peter
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