Talk:John Birkinshaw

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'Malleable' iron?
What were Birkinshaw's rails made of? Wrought iron, which is malleable, or malleable iron (as described today), a form of annealed cast iron, to avoid its brittleness.

Apart from the coincidence in naming, AFAIK there is no connection between Birkinshaw's iron and malleable iron. Birkinshaw used wrought iron, as was already widely known and produced then, and his innovation was in being able to roll it into rail sections. Andy Dingley (talk) 12:32, 12 December 2018 (UTC)