This notebook was used during December 1901. All entries are by Edison. The book contains entries, numbered from 1450 through 1486, regarding a set of nickel-iron storage battery cells. Included are notes relating to each cell's rate of electrical discharge and to the production of gas during the tests. The numbered entries do not appear to correspond to those in a concurrent series of cell test notebooks, N-01-12-12 and N-01-12-15 [not selected], which also encompass numbers 1450-1486. The pages are unnumbered. Approximately 60 pages have been used.