W.C Jacobs (left) and J. M. Brager (right) of Consumers Power Company, Jackson, Michigan, making adjustments on Illinois Institute of Technology's A-C Network Calculator during a study on the... Show moreW.C Jacobs (left) and J. M. Brager (right) of Consumers Power Company, Jackson, Michigan, making adjustments on Illinois Institute of Technology's A-C Network Calculator during a study on the calculator of the Consumers Power system. The A-C Calculator, used to test complex power systems in a controlled, miniature environment, was the tenth of its kind in the country. It was cooperatively purchased by Illinois Tech's Electrical Engineering department and a ten Midwest power companies for $80,000 in 1944. Photographer unknown. Show less