British photographic history

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watkins method of factorial development.... circa a long time ago...

I found a watkins Eikronometer and am trying to find info on the watkins factorial development method. Would like to know if there is a museum or anything near where they were made that might have information...

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The Wellington Handbook has a few lines about this method on page 28.

http://www.greatyarmouthphotographic.co.uk/pdf/Wellington-Handbook.pdf

Here is the relevant page from the Watkins Manual (2nd Ed.)

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