STANFORD, CA.- The Cantor Arts Center has deaccessioned two 19th-century American paintings from its collection: Charles Christian Nahl’s Saturday Night in the Mines, 1856, and Crossing the Plains,1856. Both works are oil on canvas. Ownership of the paintings has been transferred to the Crocker Art Museum in Sacramento, California. The Association of Art Museum Directors defines deaccessioning as “the process by which a work of art or other object . . . wholly or in part, is permanently removed from a museum’s collection.” The paintings’ permanent move to the Crocker follows both the letter and the spirit of the Association’s professional practices guidelines for deaccessioning artworks, which state: &