Re: Ecobra | Joseph Dietzgen | Eugene Dietzgen

Alan Williams

Peter, thanks for your lecture slides, they are very informative. I will be sure to watch the video you linked to later.

It's interesting that another major American instrument maker, Theodor Alteneder, apparently also left Germany due to his involvement in the 1848 revolution (he had been working for Riefler near Munich). 

Oddly, neither Alteneder nor Haff (mentioned earlier in the thread) made slide rules, despite both making/selling scale rules - the two usually go together. In Haff's case, they were the main supplier of drawing instruments to Keuffel & Esser who made their own slide rules following an early relationship with Dennert & Pape, so perhaps they had enough on their plate already.

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