Purple Ray Purple Ray The Purple Ray, created by William Moulton Marston and featured in Wonder Woman comics, is a fictional healing device that brought a person back from the dead. Prior to the comic book storyline "Crisis on Infinite Earths", Diana invented the Purple Ray in order to heal Steve Trevor from injuries he sustained when his plane was shot down and he was left adrift in the sea for days. The Purple Ray was an all-around healing device. Variations on the concept survived into Earth-1, post-Crisis, post-Zero Hour and post Infinite Crisis continuities. Once it was used to revive the
Polygraph blood pressure for police cases, a 1904 device by Vittorio Benussi used to measure breathing, and an abandoned project by American William Moulton Marston which used blood pressure to examine German prisoners of war (POWs). Marston’s machine indicated a strong positive correlation between systolic blood pressure and lying. Marston wrote a second paper on the concept in 1915, when finishing his undergraduate studies. He entered Harvard Law School and graduated in 1918, re-publishing his earlier work in 1917. Marston's main inspiration for the device was his wife, Elizabeth Holloway Marston. "According to Marston’s son, it was his mother Elizabeth, Marston’s