How Shapes Function Within A Frame

Marshall developed language so artists could communicate. He became Assistant Professor to Albert Krehbiel, Chicago Art Institute.
He carved master patterns of model ships used for recognition training WW2.
He was Chief Architect with U.S. Engineers, designed two airports in South Carolina. Also Invented official blackout light trap.
He illustrated army electronics & army radar books.
Marshall was U.S. Navy Design Officer, designed all radar rooms for all ships WW2. Tested over 5,000 men to determine how the eye reads shape.
Marshall full partner, A.L. Salzman & Sons, Architects retired 1977.
He taught Nova U.-Boca Raton Museum Middle School. Conducted workshop for teachers in Palm Beach County & Broward County for 4 years. President of Professional Artists Guild Boca, Museum.