This ledger covers the period March 1907-March 1916. As the account book of final entry, it summarizes transactions relating to the manufacture of phonographs and Bates machines. Included are capital, sales, insurance, and reserve accounts, as well as accounts in the name of other Edison companies. The flyleaf is inscribed "Works Gen'l Ledger #4." The book contains 473 numbered pages and an index; many pages are blank.