Science on the 2nd of February 1935 in history

Science

Date	Type	Text
02 Feb 1935 Lie detector	science	Lie detector In 1935, the detective Leonard Keeler conducted the first use of his invention, the Keeler polygraph, or lie detector machine, on this day, in Portage, WI. Those examined were two criminals Cecil Loniello and Tony Grignano, who were convicted of assault at their trial where the results were introduced as evidence.	0

1st February 1935 3rd February 1935

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Science on the 2nd of February 1935 in history

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