. Transactions. Fig. 7. Fig. Fig. 9. Fig. 10. Figs. 5, 6, 7, 8, 9, and lU.—Etchkd with pickic acid and magnified GO diam-eters. Shows ferrite white and sorbite-pearlite dark. The swirls offerrite can be seen in a groundmass of pearlite. CHARLES Y. CLAYTON 441

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