Description: [caption id="" align="aligncenter" width="407" caption="The electricity laboratory in one of the pavilions of the United States National Museum, now known as the Arts and Industries Building, around the turn of the 20th century, c. 1890, Unknown photographer, Photographic print, Smithsonian Institution Archives, Record Unit 95, Box 38, Folder 9, Negative Number: MAH-3668.
Description: Cyanotype, Riker Electric Mail Wagon vehicle for exhibition by Post Office Department at Pan-American Exposition, Buffalo, New York, 1901, USNM No. 13751.