Speculum metal metal mixtures usually contain two parts copper to one part tin along with a small amount of arsenic, although there are other mixtures containing silver, lead, or zinc. The knowledge of making very hard white high luster metal out of bronze-type high-tin alloys may date back more than 2000 years in China although it could also be an invention of western civilizations. Such metals were used in sculpture and to make more effective mirrors than the more common yellow easily tarnishing bronze mirrors. In that era mirrors of speculum metal, or any precious metal, were rare and only owned by
Wabash Alloys Locomotive Wabash Alloys Locomotive The Wabash Alloys Locomotive is a GE 25-ton diesel-electric locomotive built in 1940-43. Little is known about its early life, but from around 1970, it worked at Wabash Alloys, a producer of aluminum alloys, at Haskell, Arkansas. It eventually became surplus to the company's needs and they donated it to the Arkansas Railroad Museum at Pine Bluff, Arkansas on March 8, 2003. The 25-ton model was the smallest locomotive in the GE range in the 1940s and 50s. It was designed for the small industrial user. With and of tractive effort, it could pull half a dozen