[Clayart] Chemistry/light, why is cobalt blue?

ivor and olive lewis iandol at westnet.com.au
Sun Mar 2 00:59:05 EST 2014

Dear Janet Leatherwood,
Now somewhat dated, though still in print,W, A. Weyl, "Coloured Glasses" 
gives a comprehensive view of the elements we use from the transition 
elements and a few more from the Periodic Table which we ignore.
Ivor Lewis,
South Australia

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