Abstract Wood sample, circa 1936, of John C. Alexander, a 1927 graduate of the Michigan College of Mines (now Michigan Technological University) in Houghton, Michigan. Sample of guijo wood, cut from a wall plate of the Longos mine shaft in the Philippines, dewatered by the United Paracale Mining Company. Includes inscription on wood "Piece of Guijo Wood was cut from a wall plate of Bongos [probably Longos] shaft, an English Mining Co. sunk this shaft 47 years ago, but were driven out by the...