Hello, I have just about every telescope making book from Willmann Bell. Somewhere in one of those books was a drawing of the various grit sizes and the corresponding chunks of glass they remove - the coarse grits looked like boulders and the finest ones looked like sand. It might have been on a left page in the upper part of of the text. There might have been a caption something like "The guy went crazy trying to polish out a defect for 100 hours when he should have done it by fine-grinding..."
I can't find this drawing! Does this ring a bell with anyone? Do you know which book/page it might be on? Thanks! Bob Piekiel
I can't find this drawing! Does this ring a bell with anyone? Do you know which book/page it might be on? Thanks! Bob Piekiel