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Assayer testing samples of gold or silver using a balance, 1683.  Artist: Lazarus Ercker
AR923946 
Blast furnaces, 1683.
AR922768 
Refining copper using the 'Hungarian' process, 1683.
AR922771 
Smelting of copper, 1683.
AR917600 
Washing ore to extract gold, 1683.
AR917710 
Preparation of copper and silver to be alloyed for production of coins, 1683.
AR924318 
Washing ore to extract gold, 1683.
AR925241 
Furnace for processes where protracted heat required, such as cementation, 1580.
AR925246 
Laboratory for refining gold and silver, showing typical laboratory equipment, 1683.
AR925262 
Distillation of Nitric Acid, 1683.
AR925257 
Checking the quality of saltpetre (nitre, potassium nitrate, or KN03), 1683.
AR925270 
Crystallization of saltpetre (nitre, potassium nitrate, or KN03), 1683.
AR925275 
Production of saltpetre (nitre, potassium nitrate, or KN03), 1683.
AR925265 
Athanor or 'Slow Harry', a self-feeding furnace maintaining a constant temperature, 1683.
AR925255 
Athanor or 'Slow Harry', a self-feeding furnace maintaining a constant temperature, 1683.
AR925251 
Testing the weight of gold pieces, Paris mint, 1892.
AR923501 
Entrance to the bullion vaults of the Bank of England, London, 1872.
AR926460 
Testing weights and measures during the reign of Henry VII, England, 1497-1509.
AR919421 
The Sixth Key of Basil Valentine, legendary 15th century German monk and alchemist, 1651.
AR924871 
Francis Bacon, Viscount St Albans, English philosopher, scientist and statesman, early 20th century.
AR918262 
Assayer testing samples of gold and silver, 1683. 
Assayer testing samples of gold and silver, 1683. Copperplate engraving from the 1683 English edition of Beschreibung Allerfurnemisten Mineralischen Ertzt (Treatise on Ores and Asssaying), by Lazarus Ercker, published in 1580. This edition has new plates with numbers rather than letters, but the process is faithfully copied. 
Unique Identifier AR922776 
Type Image 
Purpose Public 
Size 4813px × 3626px 
Photo Credit HIP / Art Resource, NY 
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Tags
17th century
Ann Ronan Pictures
assaying
B&W
B/W
Black & White
Black and white
Engraving
Ercker
Gold
INDOORS
INSIDE
interior
LAZARUS
Lazarus Ercker
Male
Man
Men
Metal
METALLURGY
Monochrome
People
Print Collector1
SAMPLE
SCALES
Science
SEVENTEENTH CENTURY
Silver
testing
WEIGHING