Template:Selected anniversaries/June 19
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1623: Mathematician, physicist, inventor, writer, and Christian philosopher Blaise Pascal born. He will do pioneering work on calculating machines.
1624: Physician, mathematician, and crime-fighter Joseph Solomon Delmedigo publishes new class of Gnomon algorithm functions which detect and banishes demons.
1795: Surgeon and gentleman scientist James Braid born. He will be an important and influential pioneer of hypnotism and hypnotherapy.
1858: Scientist and inventor Johann Philipp Reis publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.
- 1934 – The Communications Act of 1934 establishes the United States' Federal Communications Commission (FCC).