Self-corrosion not stray current electrolysis, shown at Selkirk, Manitoba

Evidence has been gradually forthcoming, from a number of independent investigators, that cast iron pipe is not the indestructible material that it was formerly supposed to be by engineers; and the recognition of the possibilities of self-corrosion by responsible engineers and chemists ought to have considerable bearing upon the numerous controversions respecting damage to water pipes, gas pipes, and lead cables, which is usually charged against stray current electrolysis from electric railways, if there is a railway near enough to receive the blame for the damage.