Synopses & Reviews
This was first written in 1852 to teach people ore analysis, what we call assaying. The techniques don't use mass spectrometers or chromatographs, just simple techniques of crushing, combining and firing in a crucible. In essence the assayer smelted the sample you brought him to extract as much metal as possible.
Chapters are short and to the point. You learn about techniques for assaying gold, silver, platinum, copper, lead, iron, and mercury ores. And you get details for testing gold and silver coins, and even coal. Most techniques are true fire assays, but several use wet methods. And if you're not careful, these processes can certainly be dangerous.
These techniques look like a natural extension of foundry work. You don't need the described furnace with a 20 foot chimney. Instead you have electricity and can use a blower to get the necessary air blast. Anyone who has poured metal should find much of this familiar.