From the book
A Chymical Dictionary
Gerhard Dorn and John French · Diotimos Editions · 2026
Browse this book’s lexicon →Orientation
At a Glance
- The wordAn alternative name for a vitriolic residue.
- In the bookColcothar is defined as calcined vitriol or the caput mortuum of oil of vitriol.
- A place to readThe historical definition below, 1650 dictionary, unnumbered definition page 25; facsimile PDF page 353.
Historical definition
Henricus rubeus is the colcothar of vitriol.
Meaning
The definition leads to Colcothar rather than describing a person suggested by the name. Its vitriol qualifier belongs to the material identification. No separate recipe or property is supplied under this heading.
Use in the book
Colcothar is defined as calcined vitriol or the caput mortuum of oil of vitriol. Sal Calcotharinum is a salt made from that material. The cross-references distinguish the named residue from a salt subsequently associated with it. Henricus rubeus belongs to the first naming relationship.
Places to read
- Henricus rubeusRead the complete historical definition and its commentary.
- ColcotharVitriol named through calcination or through the residue of its oil.
- Sal CalcotharinumA salt derived from vitriolic colcothar.
Source note
Historical source. 1650 dictionary, unnumbered definition page 25; facsimile PDF page 353 — Facsimile