Excess heat loss in the hatless
I caution readers not to go hatless in inclement weather. As
countless generations of Yorkshiremen know, to do so could well be fatal
(Reference). All with either a basic knowledge of thermal physiology, a
degree of (not in)common sense or sufficient inquisitivity to have
investigated, know that the words 'because "40 to 45 percent of body heat"
is lost through the head' really mean: 'In a hatless but otherwise
properly clothed person 40 to 50% of body heat is lost through the head'.
Therefore it remains very sensible (and possibly life saving) advice
to wear a hat, whether on Ilkley Moor or elsewhere in cold weather.
Simon Ridout, Consultant Occupational Physician, Sellafield Ltd,
Seascale Cumbria CA20 1PG
Competing interests: No competing interests