This folder contains routine correspondence and other documents relating to Edison's personal financial interests and investments. Most of the items for 1912 consist of transaction narratives from journal entries pertaining to the Lansden Co. and the Edison Portland Cement Co. Also included are lists of expenses related to an experiment on automobile wheels and expenses connected with work on the cement cabinet, along with correspondence concerning the sale of Edison's shares of North American Transportation and Trading Co. Several documents bear routine marginalia by Edison. Courtesy of Thomas Edison National Historical Park.