Births on June 21

Hermann Scherchen, German-Swiss viola player and conductor (d. 1966)

Hermann Scherchen (21 June 1891 – 12 June 1966) was a German conductor.

10 Mar

Strowger switch
Almon Strowger, an undertaker in Topeka, Kansas, patents the Strowger switch, a device which led to the automation of telephone circuit switching.
15 May

Rerum novarum
Pope Leo XIII defends workers' rights and property rights in the encyclical Rerum novarum, the beginning of modern Catholic social teaching.
20 May

Kinetoscope
History of cinema: The first public display of Thomas Edison's prototype kinetoscope.