This folder contains accounting sheets showing comparative monthly operating expenses at West Orange laboratory and Silver Lake, New Jersey. The expenses are listed in twenty-six categories, including labor, utilities, and other forms of overhead. Two documents have been selected: (1) a summary of cumulative expenses by department for the period January-August 1919; and (2) a summary of overall expenses by month for the entire year.
Approximately 5 percent of the documents have been selected. The unselected statements show departmental expenses for single months, as well as comparative expenses across several months for some departments.
Courtesy of Thomas Edison National Historical Park.