Montserrat (mountain) which are visible from a great distance. The mountain is composed of strikingly pink conglomerate, a form of sedimentary rock. Montserrat was designated as a National Park in 1987. In 1493, Christopher Columbus named the Caribbean island of Montserrat "Santa Maria de Montserrate", after the "Virgin of Montserrat". The Benedictine Abbey can be reached by road, by the Aeri de Montserrat cable car, or by the Montserrat Rack Railway. The lower stations of both the rack railway and the cable car can be reached by Ferrocarrils de la Generalitat de Catalunya train from Barcelona's Plaça d'Espanya station. From the abbey,
Mercury battery popular power source for portable electronic devices. Due to the content of toxic mercury and environmental concerns about its disposal, the sale of mercury batteries is now banned in many countries. Both ANSI and IEC have withdrawn their standards for mercury batteries. The mercury oxide-zinc battery system was known more than 100 years ago but did not become widely used until 1942, when Samuel Ruben developed a balanced mercury cell which was useful for military applications such as metal detectors, munitions, and walkie-talkies. The battery system had the advantages of long shelf life (to 10 years) and steady voltage output.