A woodcut engraving depicting the production of saltpetre layers of calcium nitrate scrapings and lime mixed with wood put in a vat and water trickled through it. Liquor collected at the bottom. If not judged strong enough it was poured through a second vat, then boiled down and set in pans to crystallise. Dated 16th century
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP25302559
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
Same folder images: