Excerpt from The Private Book of Useful Alloys and Memoranda for Goldsmiths, Jewellers, Etc

The weight of gold is a pound, which is divided into 12 each 02. Into 24 carats, each carat* into 4 grains, and, lastly, each grain into 4 quarters: then you see the Assay quarter-grain, in reality one grain and a quarter Troy.

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