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Diotimos Library · Esotericism & Spirituality Collection · English Edition

Gerhard Dorn and John French

A Chymical Dictionary

An Expanded Diotimos Lexicon of Paracelsian and Alchemical Language

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A Chymical DictionaryOleum Calcotharinum

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English Edition · Branch 267 of 740

Oleum Calcotharinum

Book Mode

A Chymical Dictionary

p. 267

Oleum Calcotharinum

Salts solvents and liquid preparations · A Chymical Dictionary

At a Glance

The word. A vitriol oil distinguished by its red colour.

In the book. Colcothar is calcined vitriol or the residue of oil of vitriol; Sal Calcotharinum is a salt made from Colcothar.

A place to read. The historical definition below, 1650 dictionary, unnumbered definition page 36; facsimile PDF page 364.

Historical Definition

Oleum Calcotharinum is red oil of vitriol.

Meaning

The material-name and colour provide the equivalent. The definition does not state a procedure, a source of vitriol or the composition of the resulting oil.

Use in the Book

Colcothar is calcined vitriol or the residue of oil of vitriol; Sal Calcotharinum is a salt made from Colcothar. These related names should be followed through their particular products—oil, residue and salt—rather than treated as interchangeable merely because their forms resemble one another.

Places to Read

Colcothar. Vitriol named through calcination or through the residue of its oil.

Sal Calcotharinum. A salt derived from vitriolic colcothar.

Historical source: 1650 dictionary, unnumbered definition page 36; facsimile PDF page 364 — Facsimile

Sources. A Chymical Dictionary 1650, 1650 dictionary, facsimile PDF page 364, Oleum Calcotharinum

See also. Colcothar; Sal Calcotharinum

267

About This Reading Edition

The complete 706 historical definitions of the 1650 English dictionary, modernised and accompanied by expanded Diotimos commentary, reading routes, 15 textual notes and complete linked indexes.

Historical Text

A Chymicall Dictionary, London 1650, English version associated with John French, based on Gerhard Dorn’s Dictionarium Theophrasti Paracelsi. The containing volume also prints Sendivogius and Paracelsus; neither neighboring work changes this dictionary’s attribution.

About This Edition

Complete 706 definition paragraphs with new introduction, commentary, reading guides and indexes; Diotimos Editions, 2026.

Rights

The historical 1650 English text is in the public domain. New introduction, commentary, reading guides and indexes are © 2026 Diotimos Editions and published with the site owner’s authorization.