1820: First Tucson census puts population at 396.
1873: Vincente Hernandez, keeper of a general store and jewelry shop in Tucson, and his wife are beaten to death and robbed. Two days later a citizens committee hangs the murderers from the plaza's gallows.
1879: The first ice-making machine in Arizona begins operation in Tucson.
1992: Michael Bates, Amphitheater High School graduate and former University of Arizona football player, wins bronze medal in 200 meters at the Barcelona Olympics.
Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.
Lake Mead's drops raise prospect of unaffordable Hoover Dam electricity
