The emission of secondary (or fluorescent) X-rays from a material that has been excited by bombarding it with X-rays. The process can be used to determine the chemistry, and therefore the identity, of an unknown metal. This is a nondestructive test method.
Fabricating a copper chimney cap - by Nick Martin Custom fabricating shops bid all kinds of jobs. Sometimes these jobs involve materials and processes beyond those the shop typically encounters. They make for interesting work that can require brushing up on little-used skills. Building a copper chimney cap was just such a job for Barnes MetalCrafters, one that resulted in a beautiful, functional work of art.
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