One method of estimating the time of death is to measure body temperature. The normal equation for this is:
37.5oC - 1.5 oC
This formula equates to the body temperature (37.5oC), which loses 1.5 oC per hour until the temperature of the body is that of the environment around it; known as the ambient temperature. This ambient temperature - depending on how low it is - may take minutes or hours to be reached and this is a good indicator as to how long a body has been in situ.
Additionally it is worth noting that a body's temperature will drop much more slowly if the body has been exposed to extreme cold; such as being left outdoors, submerged in water or icy conditions.
The most common way of taking the temperature of the deceased is to use a rectal thermometer or to take a temperature reading from the liver, which can achieve a more realistic core body temperature.
Rigor Mortis also acts as a good measuring stick for estimating the time of death. This natural process which occurs in all of us when we die and is the natural contracting and relaxation of the body's muscles caused by changes in the body's chemical balances.
Rigor normally occurs in the smaller muscles such as those in the face and neck and will work its way down through the body as the muscles become larger.
The process normally begins roughly two hours after death and can last for anything from twenty to thirty hours. It is a common misconception that rigor does not leave the body; it will after these time frames have elapsed.
Rigor is one of the most used ways of estimating death as it occurs in the body during the first thirty-six to forty-eight hours.
it was pretty cold there where she was found , although she was wearing clothes, but according to the above she's been dead for at least 10 hours.
never seen before. old but good quality