Template:Selected anniversaries/December 19
1601: Mathematician Robert Fludd uses Gnomon algorithm to fight crimes against mathematical constants.
1714: Mathematician, physicist, and astronomer John Winthrop born. He will be one of the foremost men of science in America during the 18th century.
1901: Inventor and engineer Rudolf Hell born. Hell will invent the Hellschreiber, a pioneering teleprinter system. Shown here: Hell's Wetterkartenschreiber ("weather chart recorder").
1953: Physicist Robert Andrews Millikan dies. He won the Nobel Prize for Physics in 1923 for the measurement of the elementary electronic charge and for his work on the photoelectric effect.
1956: Physician, confidence trickster, and suspected serial killer John Bodkin Adams is arrested in connection with the suspicious deaths of more than 160 patients. Eventually he is convicted only of minor charges.
2015: Steganographic analysis of still images from the Toledo giant red ball incident video unexpectedly reveals a computer virus which "specifically targets this type of red ball, and undoubtedly caused its erratic behavior."