sentences:  David MacAdam
  
  Dr. David Lewis MacAdam (July 1, 1910 – March 9, 1998) was an American physicist and color scientist who made important contributions to color science and technology in the fields of colorimetry, color discrimination, color photography and television, and color order.MacAdam grew up in Upper Darby outside of Philadelphia, graduating from Upper Darby High School in 1928, attended Lehigh University, and in 1936 received a PhD in physics from MIT.