Duncan MacDougall’s Scale

Origin
Duncan MacDougall was a physician residing in Massachusetts that tested to see that the moment a person died, did they lose mass because their soul had left the body. He took six patients dying of tuberculosis and weighed them on a scale and waited for death to take them. He measured that the average difference of mass lost on death, which equated to 21 grams. He tried breathing hard to see if it would offset the scale, but that did not happen. To prove humans possessed souls, he did the same procedure with dogs because he believed dogs lacked a soul. His tests saw no change in mass, which proved to him humans have souls while animals like dogs don’t. His experiments have never been re-tested or his results verified.

Effects
When a person gets on top of the scale, they have their ‘soul’ leave their body for a time, to return exactly 21 seconds later. People who have used it have sworn to not speak of things witnessed during the time elapsed. A warning to agents is to not place animals on it, as it removes their ‘soul’ from them permanently.