This folder contains correspondence and other documents relating to the operation of the West Orange laboratory. Included are items regarding drilling equipment, other instruments, and chemicals and supplies, as well as letters from suppliers acknowledging the receipt of Edison's notes in lieu of immediate payment.

Approximately 10 percent of the documents have been selected. The items not selected include statements, price quotations, acknowledgments and receipts, bills of lading, and routine correspondence pertaining to supplies and equipment.