I am not even asking you about the physics that should underlie such rubbish as 'spontaneous combustion' of a human being , a dog , a mouse or a jelly fish.
In fact any child in 4th grade should be able to see through that age old balony.
And , which part do you not understand of this sentence: ' It had ,at the time , been duly investigated by eminent scientists and found to be.... what else .... a hoax."