Note 555 — Chapter XXI · OTHER TECHNOLOGICAL USES OF THE CERIUM AND YTTRIUM ELEMENTS, ZIRCONIUM AND THORIUM
Reading edition
E. 16853, 1903; D. R. P. 154807.
[556] Vide Böhm, Chem. Zeitg. 1910, 34, 361.
[557] The crude mixture of cerium, lanthanum, neodymium, praseodymium, samarium, etc., with small quantities of iron and other metals, obtained by reduction of the earth-compounds formed as by-products in the thorium industry, is technically known as ‘misch-metal.’
[558] F. 439058, March, 1912.
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