This pocket notebook was used mainly by Edison, probably during the period 1902- 1904. Included are notes and drawings pertaining to the design and construction of the iron concentration plant at Dunderland, Norway, and to operations at Edison's cement works in Stewartsville, New Jersey. Many of the pages contain references to Edison's correspondence with William Simpkin, chief engineer of the Standard Construction Corp., Ltd. The flyleaf is inscribed "Sketch & rough notes for Simpkins." The cover is marked "Simpkins." The pages are unnumbered. Approximately 50 pages have been used.