The New Yorker magazine has a feature length article on SoulPulse this week.
On April 10, 1901, Duncan Macdougall, a physician in Haverhill, Massachusetts, completed an experiment designed to measure the human soul, the first of six he would complete in his lifetime. Using an industrial scale designed for weighing silk, accurate to one-fifth of an ounce, Macdougall weighed a male tuberculosis patient before and immediately after he died. It took three hours and forty minutes for the man to expire, and at the moment of his death he lost three-fourths of an ounce. This, by Macdougall’s calculations, was the weight of the human soul.
According to Mary Roach’s book “Spook: Science Tackles the Afterlife,” Macdougall didn’t publish his findings until 1907, when his research appeared in both the Journal of the American Society for Physical Research and American Medicine. In March of that year, the Times ran a story called “Soul Has Weight, Physician Thinks.” Perhaps because he wasn’t able to find additional human subjects, Macdougall performed the rest of his research on dogs, which he determined had no souls because their weights did not change after death.
Last January, John Ortberg, a senior pastor at Menlo Park Presbyterian Church, and Bradley Wright, an associate professor of sociology at the University of Connecticut, released a simpler way of measuring a soul: SoulPulse, a technology project that captures real-time data on the spirituality of Americans…. Link to the article