Galena diode. Making such wireless receivers was a popular home hobby in Britain and other European countries during the 1930s. Scientists associated with the investigation of the diode effect are Karl Ferdinand Braun and Jagadish Bose. In modern wireless communication systems, galena detectors have been replaced by more reliable semiconductor devices. Galena Galena, also called lead glance, is the natural mineral form of lead(II) sulfide. It is the most important ore of lead and an important source of silver. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral
Galena, Missouri Galena, Missouri Galena is a city in Stone County, Missouri, United States. The population was 440 at the 2010 census. It is the county seat of Stone County. Galena is part of the Branson, Missouri Micropolitan Statistical Area. Galena was platted in 1852, and named for deposits of the ore galena near the original town site. An early variant name was "Jamestown". A post office has been in operation at Galena since 1853. The last public execution in the United States took place in Galena in 1937. According to the United States Census Bureau, the city has a total area