Fahrenheit reference points became popular following the work of Anders Celsius and these fixed points were adopted by a committee of the Royal Society led by Henry Cavendish in 1776. Under this system, the Fahrenheit scale is redefined slightly so that the freezing point of water is exactly 32 °F, and the boiling point is exactly 212 °F or 180 degrees higher. It is for this reason that normal human body temperature is approximately 98° (oral temperature) on the revised scale (whereas it was 90° on Fahrenheit's multiplication of Rømer, and 96° on his original scale). The Rankine temperature scale was
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