Title
Assay laboratory with various forms of furnace
Caption
Assay laboratory with various forms of furnace including and athanor or 'Slow Harry', 7, self-stoking furnace for cementation, 9, and barrel-shaped furnace, 3, in which draught supplied by steam from water in container placed over hot charcoals. At 4 a crucible is being gradually heated in a ring of burning coals: to incease the heat coals could be raked into a smaller circle.
From 1683 English edition of Lazarus Ercker "Beschreibung allerfurnemisten mineralischen Ertzt- und Berckwercksarten" originally published in Prague in 1574. Copperplate engraving.
Date
16th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP07111_009665P
License type
Rights managed
Available size
25,9Mb (1,9Mb) / 11,8in x 8,5in / 3543 x 2553 (300dpi)