. Electric railway journal . RAIL CORRUGATION—FIGS. 2 AND 3—NATURAL SURFACES OF CREST AND HOLLOW, RESPECTIVELY, OF CORRUGATED RAIL, MAGNIFIED 13y2 DIAMETERS; FIG. 4—SURFACE OF CREST, MAGNIFIED 110 DIAMETERS April 22, 1916] ELECTRIC RAILWAY JOURNAL 787. RAIL CORRUGATION—FIG. 5—SURFACE OF HOLLOW, 110 DIAMETERS; FIGS. 6 AND 7—LONGITUDINAL SECTIONS AT CREST AND HOLLOW, 110 DIAMETERS respectively, magnified 700 diameters. Fig. 9 hascaught one of the surface cracks shown in Fig. 4 atthe lower magnification, and both Fig. 10 and Fig. 11confirm the lower power micro-photograph in respect tothe surface
![. Electric railway journal . RAIL CORRUGATION—FIGS. 2 AND 3—NATURAL SURFACES OF CREST AND HOLLOW, RESPECTIVELY, OF CORRUGATED RAIL, MAGNIFIED 13y2 DIAMETERS; FIG. 4—SURFACE OF CREST, MAGNIFIED 110 DIAMETERS April 22, 1916] ELECTRIC RAILWAY JOURNAL 787. RAIL CORRUGATION—FIG. 5—SURFACE OF HOLLOW, 110 DIAMETERS; FIGS. 6 AND 7—LONGITUDINAL SECTIONS AT CREST AND HOLLOW, 110 DIAMETERS respectively, magnified 700 diameters. Fig. 9 hascaught one of the surface cracks shown in Fig. 4 atthe lower magnification, and both Fig. 10 and Fig. 11confirm the lower power micro-photograph in respect tothe surface Stock Photo](https://c8.alamy.com/comp/2CR71F7/electric-railway-journal-rail-corrugationfigs-2-and-3natural-surfaces-of-crest-and-hollow-respectively-of-corrugated-rail-magnified-13y2-diameters-fig-4surface-of-crest-magnified-110-diameters-april-22-1916-electric-railway-journal-787-rail-corrugationfig-5surface-of-hollow-110-diameters-figs-6-and-7longitudinal-sections-at-crest-and-hollow-110-diameters-respectively-magnified-700-diameters-fig-9-hascaught-one-of-the-surface-cracks-shown-in-fig-4-atthe-lower-magnification-and-both-fig-10-and-fig-11confirm-the-lower-power-micro-photograph-in-respect-tothe-surface-2CR71F7.jpg)
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. Electric railway journal . RAIL CORRUGATION—FIGS. 2 AND 3—NATURAL SURFACES OF CREST AND HOLLOW, RESPECTIVELY, OF CORRUGATED RAIL, MAGNIFIED 13y2 DIAMETERS; FIG. 4—SURFACE OF CREST, MAGNIFIED 110 DIAMETERS April 22, 1916] ELECTRIC RAILWAY JOURNAL 787. RAIL CORRUGATION—FIG. 5—SURFACE OF HOLLOW, 110 DIAMETERS; FIGS. 6 AND 7—LONGITUDINAL SECTIONS AT CREST AND HOLLOW, 110 DIAMETERS respectively, magnified 700 diameters. Fig. 9 hascaught one of the surface cracks shown in Fig. 4 atthe lower magnification, and both Fig. 10 and Fig. 11confirm the lower power micro-photograph in respect tothe surface characteristics. Fig. 11 is a longitudinalsection at a crest, showing one of the transverse cracksin section. The magnification is 300 diameters, and thedepth of the crack as shown is about 0.067 in. Thecrack gets through the altered skin layer into the nor-mal network structure below. Fig. 12 is a longitudinalsection of a hollow, magnified 700 diameters, showingone of the smaller pits in the rail table in section. The high-power photographs confirm the low-powerones, by showing that the lack of apparent structure inthe crests is not due to insufficient magnifying power.It is possible that this lack of visible structure is dueto the meta
