- Digital Commonwealth
- Perkins School for the Blind
Blocks arranged in geometric formations on a tabletop with grooved grid pattern. The blocks are arranged in architectural forms. The photograph is titled "Inventions made with the Third and Fourth Gifts." From photograph album "Kindergarten Department of the Perkins Institution for the Blind Boston, MA." Prepared for the World's Columbian Exposition, 1893. Alexander Mell.
Black and white photograph
- Samuel P. Hayes Research Library, Perkins School for the Blind, Watertown, MA. Contact host institution for more information.