Description: [caption id="" align="aligncenter" width="430" caption="Smithsonian Secretary S. Dillon Ripley (1913-2001) riding a scooter at the 1974 Folklife Festival in the Mississippi delta section, with a cotton field behind him, by Unidentified photographer, Photographic print, Smithsonian Institution Archives, Record Unit 613, Box 269, Folder: SDR Photos, Negative number:
Description: A collection of interviews from 2013 records the history of the Smithsonian Associates. One of recordings included Brigitte B. Blachere, the program manager of the organization. She detailed the youth and family programs she has developed for 23 years.
Description: The term “personal equation” came into use in the 19th century as scientists found that observers have inherent biases: some anticipate events, and some report events after they have occurred. Recognition of the problem led to a spate of personal equation instruments: some measured biases of this sort, and some reduced the effect of personal errors. Most of these