Note 32 — Chapter IX · (continued 2)
Reading edition
Consult Percy's Metallurgy of Silver and Gold, p. 172; A.C. Claudet, Trans. Inst. Mining and Metallurgy, vol. vi. p. 29; G.M. Roberts Trans. Amer. Inst. Mining Engineers, Buffalo Meeting, 1898; J. and H.S. Pattinson, Journ. Soc. Chem. Industry, vol. xi. p. 321.