Here is some glass company paperwork. The scans are quite large. I thought about reducing them some. Then I found that decreasing the dimensions in my paint program actually increased the kilobytes in some cases. So I left them as scanned. I'll let you adjust them in your viewers.
Click to enlarge - might need to double click for full size
1901: An invoice? For some "separators with ring" whatever that would be
1913: Marble price list, with some accounting on the back
. .
1932: a request for payment, from Elias Greiner Vetters Sohn to Louis Müller's Söhne. Greiner and Müller's may have made similar items but for some reason Müller's bought items from Greiner. They owed money for several months and Greiner needed it to buy more supplies.
Winnie gave me some leads on what the documents say, including the great variety of items listed in the company headers. I will probably try to incorporate more of that into this post as I digest my notes. For now, this is it. (Thank you Winnie!)