This ledger covers the period June 1890-December 1896. It contains accounts pertaining to Edison's royalties, his companies and business operations, laboratory suppliers, Ft. Myers, and Glenmont. Unlike the other laboratory ledgers, experimental cost accounts for this period are located in a "labor and material" sub-ledger, while stock and bond accounts are in a "sundry investments" sub-ledger. The book contains 320 numbered pages and an index. The spine is stamped "General Ledger. No. 6. Laboratory T.A. Edison, Orange, N.J." It is labeled "9" and "June 1, 1890 to Dec. 31, 1896."

Blank pages: 192-239, 278-320.

This book was microfilmed at a reduction ratio of 16:1.