John, I guess I wasn't clear, (which is nothing new)I agree that wind, as well as motion, like skiing at 40 MPH, will cause the heat to be drawn away from any surface more quickly. What I was referring to was the reference to heat loss due to evaporation of moisture that Gerald was referring to. That is a process entirely different from wind chill. If you are perspiring while exposed to very low temperature and wind you will loose heat that much faster, but it will be due to two different physical processes. Evaporation of a liquid consumes heat and convection increases the rate of heat loss. I am just saying that both taking place on the skin at the same would be highly unlikely.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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