organ music), and were received positively by audiences. References External links Inside an American Factory: Films of the Westinghouse Works, 1904 Film series introduced in 1904 1904 films 1904 short films United States National Film Registry films American black-and-white films American short documentary films American silent short films World's fair films Louisiana Purchase Exposition Films set in Pittsburgh 1904 in Pennsylvania 1900s short documentary films Short film series 1900s American films