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.
Heat Wave (Martha and the Vandellas song). From Wikipedia, the free encyclopedia.  Heat Wave  is a 1963 single penned by the HollandâDozierâHolland songwriting team and made popular by the Motown group Martha and the Vandellas.Released as a single on July 9, 1963, on the Motown subsidiary label Gordy, it peaked at number 4 on the Billboard Hot 100 and number 1 on the Billboard Hot R&B chart.ackground [edit]. Heat Wave was one of several songs written and produced by the HollandâDozierâHolland songwriting and producing team. It was the second hit collaboration between Martha and the Vandellas and the team, with the first being  Come and Get These Memories .