In 1867 was born Andrew Ellicott Douglass, astronomer and archaeologist. He is called the father of understanding Dendrochronology
Dendrochronology is a dating technique that exploits the annual growth increments of trees to provide a precise estimate of the age (or period since formation) of a wood sample. New cells, forming a ring, are added to the outer part of a tree trunk during each growing season.
In music, 1965 - Marty Balin and Paul Kantner formed a Folk-Rock group that would evolve into the Jefferson Airplane, the premier San Francisco psychedelic band of the late '60s.