Need a glossary subset of abbreviations/measurement symbols and alchemical symbols; these should also come up as a roll-over comment in the text (e.g. "Dram", "ounce", "mercury")
See the table of symbols in the 2018 Markup Protocol
See https://github.com/cu-mkp/m-k-manuscript-data/blob/master/referencedocs/alchemical-measurment-symbolsunicode.csv - table created from PW18 Markup Protocol