It is important not to confuse IMC with IFR (instrument flight rules) â IMC describes the actual weather conditions, while IFR describes the rules under which the aircraft is flying. Aircraft can (and often do) fly IFR in clear weather, for operational reasons or when flying in airspace where flight under VFR is not permitted; indeed by far the majority of commercial flights are operated solely under IFR.
Norbert Rillieux. Norbert Rillieux (1806-1894) was the inventor of the multiple-effect vacuum evaporator, which revolutionized the processing of sugar. He gained recognition as one of the prime architects of the modern sugar industry.
IR Links. Count Rumford was the first to describe the methods of heat transfer as we know them today to be by conduction, convection and radiation and in doing so exploded the caloric theory of heat transfer. In 1795, already famous for his work on heat, Rumford turned his attention to improving fireplaces.He understood that all the heat had to be radiant heat since the air heated by the fire was mixed with smoke and wasted up the chimney.n 1795, already famous for his work on heat, Rumford turned his attention to improving fireplaces. He understood that all the heat had to be radiant heat since the air heated by the fire was mixed with smoke and wasted up the chimney.