Fahrenheit He then re-calibrated his scale using the melting point of ice and normal human body temperature (which were at 30 and 90 degrees); he adjusted the scale so that the melting point of ice would be 32 degrees and body temperature 96 degrees, so that 64 intervals would separate the two, allowing him to mark degree lines on his instruments by simply bisecting the interval six times (since 64 is 2 to the sixth power). Fahrenheit observed that water boils at about 212 degrees using this scale. The use of the freezing and boiling points of water as thermometer fixed
Port Nolloth to the north along the Orange River. The cold Benguela Current in the Atlantic Ocean off the west coast of South Africa moderates the climate of the coastal region to a huge degree. The average daily maximum in summer is only just above 20 degrees Celsius (68 degrees Fahrenheit) with a variation of less than 4 degrees between the hottest and coldest months of the year at Port Nolloth. On average the temperature reaches 30 degrees Celsius (86 degrees Fahrenheit) on only 15 days per year, compared to an average of 220 days per year at Vioolsdrif, less than to