Sienna
Description
This section is from the book "The Home Cyclopedia Of General Information", by Charles Morris. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
Sienna
A reddish-brown pigment made from earth got from Sienna in Tuscany. This clay is colored by the oxides of iron and manganese. Burnt sienna is the same clay made redder by the action of fire.
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