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 In modern wireless communication systems, galena detectors have been replaced by more reliable semiconductor devices.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, Alaska The City of Galena is incorporated as a first-class city, governed by a city council. The city's mayor is Jon Korta. The Louden Tribal Council is elected to represent the local Athabascan Native community. The council's tribal chief is Jenny Pelkola. The City of Galena operated a full-time police department. There is an Alaska State Troopers post in Galena with two troopers and a trooper-pilot. Galena has a volunteer Rescue Squad composed of Alaska Emergency Trauma Technicians (ETT) and Emergency Medical Technicians (EMT), and a volunteer fire department which recently received new advanced firefighting apparatus from the U.S. Air Force