Specification of Mayer Oppenheim : manufacture of glass
Oppenheim's manufacture of glass
Displayed in the exhibition titled "The Science of Glassmaking : 8 Centuries of a Magical Art", held at the Rakow Research Library, June 27, 2008-January 4, 2009.
Patent no. 969, submitted December 17, 1770 and inrolled December 21, 1770.
"A new method of making or manufacturing a beautiful opaque or transparent garnet or red glass"--P. .