Sum of the Arts
Number of nickel cadmium batteries required to power the first digital camera, which was created in 1973 = 16

Sum of the Arts is a periodic tabulation of numbers floating around the art world and beyond.
- Number of towers on the Smithsonian Castle, first photographed in 1850 = 9
- Number of full-time dance critics in the United States = 2
- Number of people out of 150 who survived the maritime catastrophe depicted in Théodore Géricault’s “The Raft of the Medusa” (1818–19) = 10
- Number of states where Joseph McGill has slept in former slave lodgings as part of his ongoing Slave Dwelling Project = 14
- Number of nickel cadmium batteries required to power the first digital camera, which was created in 1973 = 16
- Average hourly rate in American dollars performers were paid for major museum exhibitions in 2010 = 20
- Hours in which the “Houses While You Wait” machine of the 1940s could build a two-bedroom concrete home = 24
- Number of fiberglass fish in which visitors can ride the nautilus shell-shaped carousel opening in Battery Park on August 20 = 30
- Seconds that Cai Guo-Qiang’s “Sky Ladder” exploded over a Chinese fishing village = 150
- Pantone number of a black coffee in Monaco’s new Pantone Cafe = 19-111