./. A. Kivinff and J. C. IV. Ihunfi'iai. 
Idul. Tran.s., xl, t<A. 200, Plate 8. 
Fig. 7. Specimen ;ifter 170,000 reveisals of a mti’css nf 12-.‘) 
tons 2 )ei' S(i. inch, x 150. 
Fig. S, Same after I'c-polishing and re-ctcliing. x 150. 
lOg. 14. Another jjart of tlie sjiecinien f)f figs. 0-12, after 
100,000 reversals, x 1000. 
Fig. 15. S|:ecimen after .‘1,000,000 revei.sals of a stiess nf 
O'O t(m.s jier sp. inch. x 1000. 
