Harold Hitz Burton,
Roland Electrical Co v. Walling D…
“ The necessity to the petitioner's customers, in their productive work, of the sales made and the services supplied to them by the petitioner's employees is the foundation of petitioner's business. The essential need for motors and wiring in the conduct of electrically operated productive processes of manufacture is beyond question. When commercial or industrial producers, such as the petitioner's customers, use electric motors in the production of goods for interstate commerce, services such as those of petitioner's employees are necessary to the continuity of such production. ”
