Quote Originally Posted by jnanian View Post
the horenstein book, basic balck and white photography
has a photographic problems image index ...
Quote Originally Posted by Mark_S View Post
The issue with threads like this is that although there may be some good suggestions that come, many of the replies (including this one), will not really be of help to someone trying to troubleshoot their issues. What would be good is if someone could curate the suggestions and create a document which could be placed somewhere like this to serve as a reference.
Agreed. Getting back to john's original quest: Many basic B&W photography books had such example pages. I found this on Google books:


I think John was asking not so much for a "mistakes I've made in the darkroom" thread (actually there has already been one of those), but pictorial examples.