Re: Do any duplex circular slide rules have the front and back center disc connected?


Mark Davis
 

I must add that, while the discs are connected front to back, there doesn't appear to be any useful way to chain calculations from front to back. In any case, neither the disk nor outer ring are aligned on the Dempster model 'AA' I have. They are almost aligned on my B.C. Boykin RotaRule 510, but this appears to be coincidental.

Mark Davis

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