This collection consists of correspondence from company president R.C. Lanphier, information on a proposed company merger, tariff negotiations and the Springfield Refrigeration Company as well as annual reports, meter purchase contracts and company minutes from the Sangamo Electric Company. Originally founded in 1899 by Lanphier and Jacob Bunn, Jr., the Sangamo Electric Company went from producing electric meters in its early years to manufacturing transformers, computer equipment and even tape recorders in the later years. At its height it employed over 3,000 people in Springfield. Also included in the collection are numerous photographs of the Springfield plant buildings, a handwritten manuscript about the history of the company, the official company history by R.C. Lanphier and bound volumes containing ledgers for the Illinois Watch Company and other Sangamo entities as well as a box of artifacts containing Sangamo employee pins, advertising pencils, matchbooks and other memorabilia.