Without mention of Lavoisier's heroic final experiment. Dr. Dalrymple discusses beheadings.

Charles I was beheaded with an axe: Such a death was considered nobler and more dignified than mere hanging, a form of execution unbecoming for the upper classes. Beheading remained the prerogative of the well-born in Europe until Dr. Guillotin, in the name of humanity, proposed his democratic beheading machine after the Convention decreed in 1792 that all executions henceforth should be by decapitation; the machine swiftly proved popular with the crowds and was last used in public in France in 1939. There was once a considerable and learned medical debate in France not only about the most humane method of severing the head from the body, but about whether consciousness survived beheading, the lips and eyes of the beheaded having sometimes been seen in the basket to move for some seconds after separation from the neck.

Since then, our sensibility in the matter of decapitation has changed greatly. During the war the Japanese beheaded many of their prisoners, not as a tribute to their nobility, but as an expression of complete contempt for them. This provoked our revulsion. Beheading of any kind henceforth seemed to us barbaric and primitive. One might have moral qualms about the hygienically sound, quasi-medical, almost euphemistic executions by injection that take place in chambers bearing a too-close resemblance to operating rooms, but no one would propose beheading as an alternative.

Via Tinkerty Tonk.