Dr. MacDougall’s experiment in Haverhill, Massachusetts, was built on the premise that if the soul is matter, it must possess mass. He modified a massive Fairbanks scale to detect minute changes in weight. Key elements of his setup included:

• A custom-built bed secured to a precision scale.
• Patients suffering from tuberculosis to ensure a ‘quiet’ death.
• Constant monitoring of the scale’s indicator during the final moments of life.

During his first successful trial, MacDougall observed the scale drop by approximately 21.3 grams the moment the patient expired. This result became the foundation of the ’21-gram soul’ theory. While this captured the public imagination, it is important to view such historical anomalies with skepticism, much like the mysteries found in The 1904 St. Louis Marathon.

The legend often ignores the reality of MacDougall’s other five subjects. The data was riddled with contradictions:

• Two cases were excluded due to equipment failure.
• One patient’s weight loss ‘returned’ to the body shortly after death.
• Another patient’s weight loss occurred in two distinct stages.

These inconsistencies suggest that the ’21-gram’ figure was likely a result of measurement error rather than a spiritual phenomenon.

MacDougall’s experiment remains a fascinating case study in the intersection of science and belief. Like other unsolved mysteries, it highlights the human desire to quantify the unquantifiable. Whether viewed as a pioneer of fringe science or a purveyor of a hoax, MacDougall’s work continues to haunt our understanding of the transition between life and death.