User:Yitzilitt/Exploring pendulum

The exploring pendulum is an ancient pseudo-scientific method used to analyze chemical compounds.

According to https://www.old.quackwatch.org/01QuackeryRelatedTopics/ideomotor.html: Probably the first major scientist to become concerned about the mischief being created by ideomotor action, although he did not know the concept by this name, was the French chemist Michel Chevreul. Chevreul, who lived for one hundred three years, became interested in the experiments of some of his fellow chemists around the beginning of the nineteenth century. These colleagues were using what was known as "the exploring pendulum" to analyze chemical compounds.

The first recorded use of the exploring pendulum occurred around 371 C.E. A priest would bow over a plate, the edge of which was marked with the letters of the alphabet. This "diviner" or "oracle" would hold a ring, suspended from a thin thread, over the center of the plate. A question would be put to the priest. The movements of the ring would then be observed. When the ring was set in motion, it would swing toward one of the letters. This letter would be recorded; then the same process would be used to select another letter. This would continue until one or more words, which answered the question, would be generated. In this, we see the origins of the modern Ouija board, used to this day by occultists for divining purposes [8].

In the early nineteenth century, certain chemists were advocating this method for analyzing the composition of substances. In 1808, a Professor Gerboin of Strasbourg wrote an entire book on use of the pendulum for chemical analysis [9]. As a budding scientist, Chevreul was intrigued, but he remained skeptical. He was surprised, however, to find that the pendulum worked as advertised when he tried it over a dish of mercury. He carried out more tests, however. To see if a physical force was responsible for the movement of the pendulum, he placed a glass plate between the iron ring and the mercury. To his surprise, the oscillations diminished and then stopped. When he removed the glass plate, the pendulum movements resumed. He next suspected that the pendulum moved because it was difficult to hold his arm steady. When he rested his arm on a support, the movements diminished but did not stop altogether.

Finally, Chevreul did what none of his predecessors had thought of doing. He conducted the equivalent of what we would call a double-blind trial. He blindfolded himself and then he had an assistant interpose or remove the glass plate between the pendulum and the mercury without his knowledge. Under these conditions, nothing happened. Chevreul concluded, "So long as I believed the movement possible, it took place; but after discovering the cause I could not reproduce it." His experiments with the pendulum show how easy it is "to mistake illusions for realities, whenever we are confronted by phenomena in which the human sense-organs are involved under conditions imperfectly analyzed." Chevreul used this principle of expectant attention to account for the phenomena of dowsing, movements of the exploring pendulum, and the then current fad among spiritualists, table-turning.

Chevreul was one of France's most prestigious scientists by the time he conducted these investigations. The author cites:

8. Jastrow J. Wish and Wisdom. New York, NY: Appleton-Century-Crofts; 1935.

9. Faraday M. Experimental investigation of table turning. Atheneum. July 1853:801-803.