"The Beinecke Digital Images Database contains approximately 60,000 images of a wide range of materials from throughout the Beinecke Collections: photographs, manuscripts, correspondence, artwork, objects, and illustrations and selected pages from printed works. About 20,000 of these images were scanned from the Photonegative File, a file containing negatives and color transparencies of images selected for reproduction or study by patrons over the last twenty years. Data describing these images in most cases is very brief, but generally includes call number and subject or author. For a complete description of the data fields, refer to Photonegative Descriptive Data. All other images in the Beinecke Digital Images database are scans of the original material in full 24-bit color. Approximately 1200 images are added every two weeks."