Choking alone (without back blows) to assist a choking victim, is referred to as "The Heimlich Maneuver." The purpose of abdominal thrusts is to create pressure that will expel any object lodged in the airway upwards to relive the obstruction. The Heimlich Maneuver specifically excludes back blows; its inventor, Dr. Henry Heimlich, believed that back blows were likely to cause an airway obstruction to become more deeply lodged in the victim's airway. So, while abdominal thrusts are part of other choking victim protocols, the Heimlich Maneuver uses only abdominal thrusts to attempt to dislodge airway obstructions. The American Red Cross recommends
What Is Life? his 1922 article "Variation due to Change in the Individual Gene" already laid out all the basic properties of the "heredity molecule" (then not yet known to be DNA) that Schrödinger was to re-derive in 1944 "from first principles" in "What is Life?" (including the "aperiodicity" of the molecule), properties which Muller specified and refined additionally in his 1929 article "The Gene As The Basis of Life" and during the 1930s. Moreover, H. J. Muller himself wrote in a 1960 letter to a journalist regarding "What Is Life?" that whatever the book got right about the "hereditary molecule" had already