Cross-section preparation for art.

Cross-section preparation for art.

vintagenational:  Photo by Willard R. Culver. From “U. S. Capitol, Citadel of Democracy,” National Geographic, August, 1952.  An Artist Sitting on the Platform-supported Canvas Cleans a Rotunda Painting Marie Kalnoky freshens “The Surrender of General Burgoyne,” one of four documentary pictures made by John Trumbull especially for the Capitol. Trumbull (1756-1843), who drew on his own Revolutionary experiences, had the additional advantage of painting his heroes in the flesh.

vintagenational: Photo by Willard R. Culver. From “U. S. Capitol, Citadel of Democracy,” National Geographic, August, 1952. An Artist Sitting on the Platform-supported Canvas Cleans a Rotunda Painting Marie Kalnoky freshens “The Surrender of General Burgoyne,” one of four documentary pictures made by John Trumbull especially for the Capitol. Trumbull (1756-1843), who drew on his own Revolutionary experiences, had the additional advantage of painting his heroes in the flesh.

Tim's Vermeer used a 4-inch diameter lens with a focal length of 28 inches, a concave mirror with a focal length of -12 inches, and a small first-surface mirror mounted on a stick.

Tim's Vermeer used a 4-inch diameter lens with a focal length of 28 inches, a concave mirror with a focal length of -12 inches, and a small first-surface mirror mounted on a stick.

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