14th April 2006
21 Grams
I recently took part in a debate with Ross Hemsworth (see: Audiomartini) hosted by Rick Wood. During the debate Ross mentioned that something on this website was incorrect. Surely not? Specifically Ross drew my attention to the following;
“Mia also seemed to think that immediately after death the human body weighs just a tiny bit less. This weight loss being due to the departing of the spirit body. Chris French assured her this was not true.†(Original commentary here)
The point I made at the time was that this is absolutely correct in that Chris French really did assure her this wasn’t true. However I confess I didn’t really know much about the actual research Mia Dolan was alluding to – so I decided to look into it.
The original experiment was carried out by Dr Duncan MacDougall who worked in Haverhill , Massachusetts . The experiment was carried out in 1907 (not 1926 as Ross thought in the interview) when the good doctor set up a weighing machine and a specially converted hospital bed. He ran six human experiments in all having carefully selected patients who were unlikely to thrash about while they were dying.
His basic premise was that ‘souls’, if they existed, should have substance because if they hadn’t then how could the personality survive with nothing to support it. In his own words it had to be a “space-occupying substanceâ€. Interestingly it was a similar question posed by myself that lead Ross to mention this example. The problem is whether the ‘soul’ (and indeed much paranormal phenomena) is physical or non-physical. If it is non-physical how can it interact with physical material? How could a ghost reflect light so that you could see it or a spirit cause a change in temperature? Alas, despite all the mediums in contact with the dead, this has never been explained. On the other hand if the soul is physical, and if it weighs 21 grams it must be, why can it not be detected by science?
Dr MacDougall results were not entirely consistent. His first patient showed a loss of three quarters of an ounce (which I make 21.26214234375 grams). The next was somewhat difficult to ascertain as he was unsure as to the exact moment of death, nevertheless a small weigh loss was recorded. The third lost and ounce at the point of death but, strangely, lost another ounce a few minutes later. He felt the forth test didn’t provide accurate data and the but the fifth was rather interesting in that the patient initially lost three eighths of an ounce when he died only to put it back on again. Subject number six was also declared null and void as the patient rather inconsiderately died before the weighing machine was ready.
So in essence this piece of paranormal folklore boils down to not very much. In fact only the very first experiment seems to fit the description so often quoted.
One other aspect worthy of mention is that most spiritualists claim that animals also live on after death (Derek Acorah certainly does) but this does not concur with Dr MacDougall’s own findings. He did the same experiment using 15 dogs (which were obviously destroyed as part of the experiment) and found there was no corresponding loss of weight.
Questions have inevitably arisen as to the accuracy of this experiment. How do you decide the exact point of death? How accurate was the equipment? And so on.
However it should be pointed out that even if the body is shown to loose weight at the point of death it cannot automatically be assumed that this is due to the departing of the soul. If such a loss does occur and we aren’t sure why then all that can be claimed is ignorance. However this small scale experiment conducted 100 years ago doesn’t really allow any meaningful conclusion to be drawn but that won’t stop people from doing it.
The term ’21 Grams’ comes from the film of the same name starring Sean Penn. In this we are told, “They say we all lose twenty-one grams at the exact moment of our death. Everyone, twenty-one grams. The weight of a stack of five nickels. The weight of a chocolate bar. The weight of a hummingbird.”
Poetic but not true.
Lots of links on this subject.
~
More about the issue here:
madsci.org/posts/archives/20 … .Gb.r.html