| RefNo | CLP/9i/18/1 |
| Level | Item |
| Title | Manuscript, description of a Swedish stone, which affords sulphur, vitriol, allum and minium by G Talbot |
| Date | [1666] |
| Description | Description of a stone imparted to Talbot in his capacity as Extrordinary Envoy in Demark and the process by which various useful minerals are extracted from it. 'There is a stone in Sweden of a yellow colour, intermixed with streaks of white (as if composed of gold and silver)'. There are different processes for extracting each compund from the stone over a period of years. Melting for sulphur, sun drying to the point of combustion and infusing with water for blue vitriol [copper sulfate], reuse of the infused water mixed with urine and ash to make alum, and baking the remaining sediment in home ovens to leave red minium powder [lead tetroxide] for painting and plastering.
Includes a small figure of an iron pot used in the process of sulphur extraction, appears in the margin of page 1 (see CLP/9i/18/2).
Read to the Royal Society on 23 May 1666
Subject: Mineralogy / Chemistry / Industry |
| Language | English |
| Extent | 3p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
| RelatedMaterial | DOI: 10.1098/rstl.1665.0140
Printed in 'Philosophical Transactions' vol 1, no 21, p 375 |
| RelatedRecord | RBO/3/37 |
| CLP/9i/18 |
| CLP/9i/18/2 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA6229 | Talbot; Sir; Gilbert (c1606 - 1695); diplomat | c 1606 - 1695 |