This ledger covers the period January 1904-June 1907. As the account book of final entry, it summarizes transactions pertaining to the experiments performed at the laboratory. There are also accounts relating to Edison's royalties, his companies and business operations, laboratory suppliers, the Fort Myers laboratory, and Glenmont. Entries for experimental expense accounts include the project numbers assigned in laboratory record books N-01-03-15 and N-10-07-26. The spine is stamped "Ledger" and "7." It is labeled "T.A.E. Personal General Ledger Jany 1, 1904 To June 30, 1907." The front cover is labeled "Ledger No 7 Personal General Ledger Jany 1st 1904-June 30th 1907." The book contains 545 numbered pages and an index; many pages are blank.