On the metric scale of measuring temperature, zero degrees is at the point which water freezes, and one hundred degrees is when water boils.
WHat are the likewise parameters for the farenheight scale? I was wondering what happens at zero farenheight, why did they choose zero to be in this place? It all seems a mystery to me, being a user of the metic…
If someone could help me out here, that would be much appreciated as this is the type of thing that no body seems to know…
According to Treasure Troves, " The original definition of 0°F was the freezing point of a water-ice slurry."
According to Cecil, it’s pretty much arbitrary: 0°F was purely random: Seems the good scientist Dr. F. borrowed from, Ole Roemer, had no love of negative numbers, so he had pretty much picked a point colder than it was ever likely to get in his hometown. 212°F for boiling wasn’t even considered, as the upper landmark on the scale was supposed to be 90°F as the normal human body temperature (which, BTW, is a little cool: 98.6°F is a better average value, but 90°F is probably within normal limits).
Oh, eh, reading the article more closely: 96°F was F’s estimation of normal human body temperature. Still a little cool, but probably a bit better than 90. 
Recent argument on this topic in this thread: Celsius vs. Centigrade (Which despite the title, got way into Fahrenheit).