This folder contains correspondence and other documents relating to the business of the Edison Pulverized Limestone Co., which marketed the byproducts of Edison's cement production and delivered part of its output to his chemical plants at Silver Lake, New Jersey. The two items for 1918 are an annual meeting notice and a routine letter notifying Edison that he had been elected a director at the same meeting. Both were issued by acting secretary William E. Horne. Courtesy of Thomas Edison National Historical Park.