Candela unit, the "candela". In 1967 the 13th CGPM removed the term "new candle" and gave an amended version of the candela definition, specifying the atmospheric pressure applied to the freezing platinum: The candela is the luminous intensity, in the perpendicular direction, of a surface of square metre of a black body at the temperature of freezing platinum under a pressure of newtons per square metre. In 1979, because of the difficulties in realizing a Planck radiator at high temperatures and the new possibilities offered by radiometry, the 16th CGPM adopted the modern definition of the candela. The arbitrary (1/683) term
Rosario Candela who was counting, anywhere from twenty-three to thirty-seven rooms, the discrepancy caused by such questions as whether one included hallways and foyers the size of ballrooms, servants quarters, and the fourteen bathrooms". During the Great Depression, work fell off dramatically and Candela received only sporadic commissions. While the quantity declined considerably, the quality of his designs rarely suffered. During this time, he expressed his interest in codes and ciphers, publishing two books on the topic. He continued his practice up until his death in 1953. Chesley Bonestell, first an architect, and later a noted science fiction illustrator, painted two pictures