Re: The DI Scale

Ian Lodge

Thanks for that Rod. I was basing my argumentent on my own collection, but will try searches of Herman’s and Bill Robinson’s archive. I did use your literature search to look for “DI scale” but got no results.

As an aside, I believe that I have an example of every Dietzgen log-log duplex rule made, except for a 1731 with a DI scale. I have only ever seen one on eBay and I was outbid in the last few seconds.


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