This folder contains two draft versions of a letter from Edison to Herman E. Dick, his representative at the Edison Ore Milling Syndicate, Ltd. One version, dated May 11, 1900, is in Edison's hand and is attached to a letter from 1921 bearing his marginalia. It includes two drawings of mining operations. The other version, mistakenly dated May 1, 1900, is a typed draft with changes and marginal notations by Walter S. Mallory. The letter, prepared for British cement producers, contains Edison's description of the stages in the cement production process from mining to roasting. Also mentioned is Edison's experimental roaster at the West Orange laboratory and his expectations for a high-capacity, automatic cement plant.

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