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Zircon, monazite and other minerals used in the production of chemical compounds employed in the manufacture of lighting apparatus (1916)

Pratt, Joseph Hyde, 1870-1942 · Raleigh, N.C. : Edwards & Broughton Printing Co. · leaf 68

An illustration from Zircon, monazite and other minerals used in the production of chemical compounds employed in the manufacture of lighting apparatus, 1916, leaf 68 — A. Section of the Wetherill magnetic separator, Rowand type. B. Section of the Wetherill magnetic separator, the type that has been adopted in many of the Carolina monazite mills. ZIRCON, MONAZITE AND OTHER MINERALS 61 4. In using the static machine, all the minerals but monazite andgarnet are…

Rare earths · Lighting

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