MARVEL WHITESIDE PARSONS, always know as Jack, was born October 2, 1914 in Los Angeles, California. A chemical engineer and explosives expert, he was a principal scientist in the experimental rocket research group attached to the California Institute of Technology during the 1930's. Their testing range in the area of Devil's Gate Dam above Pasadena has since grown to become the Jet Propulsion Laboratory; Parsons was also a co-founder of the Aerojet General Corporation.
Together with his first wife, Helen Parsons Smith, Parsons joined the Ordo Templi Orientis (O.T.O.) in 1941, the same year as his most successful scientific achievement, Jet Assisted Take-Off (JATO). He was very much the young lion of the occult Order and, under the tutelage of Aleister Crowley, briefly served as the acting master of Agape Lodge. His now famous invocation, "The Babalon Working," was first performed in 1946, with former WAVE Marjorie Cameron serving as Scarlett Woman and L. Ron Hubbard, future founder of the Church of Scientology, channeling words from the ether as Scribe while Jack performed as Priest.
The "Working" reset the course of Parsons' life, ending his relationship with Aleister Crowley and the O.T.O. In his surviving essays and polemical writings, Parsons anticipated by many years the ethical, moral, religious and social dilemmas of the future.
Parsons died in an explosion of mysterious origin at his chemical laboratory at home in Pasadena on June 17, 1952. His second wife and collaborator, the artist Cameron, preserved and carried on his work until her death in 1995. In 1972 the International Astronomical Union named a crater on the moon (37°N 171°W) after Parsons in recognition of his pivotal role in developing the solid fuel rocket.