1892: The Arizona Medical Association is organized in Phoenix. It is incorporated on June 16, 1950.

1929: Yuma Mesa Grapefruit Co. announces it will erect a $25,000 packing house in Yuma and the Bomberger Seed Co. would construct a $10,000 warehouse and seed laboratory.

Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.