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Published online by Cambridge University Press: 28 July 2016
Note on page 172 * σorig= stress withstood by undrilkd specimen.
σn=ditto when drilled.
σB=tensile strength of material.
Note on page 174 * S = stress range.
N=Number of cycles.
Note on page 176 * e = eccentricity of loading.
c = distance of extreme filament from neutral axis.
r = radius ,of gyration of cross-section of column.
Note on page 164, 192 * Abstract Available.