This folder contains correspondence and other documents relating to the Dunderland ore milling project. Among the correspondents are Edison; Stephen Hungerford Pollen, secretary of the Dunderland Iron Ore Co., Ltd.; and William Simpkin, the draftsman responsible for executing Edison's designs. Included are items pertaining to Edison's proposed alterations in the crushing rolls, along with a letter by Simpkin discussing inspections of the cement works at Stewartsville, New Jersey, and his interviews with Edison at West Orange. Also included is a diagram of drilling operations.

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