Thomas A. Edison and George Westinghouse meet at the Chicago World Fair in front of an old lady demonstrating Chinese calligraphy. At the start of the conversation, the lady starts writing the character for Da but in a later overhead shot, the character has not been written. The camera changes back to the previous angle and the lady is completing the character. Da means 'great' or 'big'.
Mrs Westinghouse says the speed of sound "travels at a constantly diminishing rate of speed", which makes no sense; then she says "the fastest rate on record is 11,463 feet per second". The speed of sound in the atmosphere at sea level is one tenth that, about 1100 feet per second. It is not something which has any "record" value.
Toward the end of the film, when Thomas A. Edison and Samuel Insull are dining together, both men use their fork in their left hand to bring the food to their mouths. This was appropriate for Insull, who was born and raised in London; but not for Edison, who was American.
Shot of newspaper column (describing electrocution of horse) shows a series of sub-heads, but first line of story reads as standard place filler, "Lorem ipsum ..."
The film places Mary Stilwell Edison's death on October 9, 1888. Mary died on August 9, 1884, aged 29. By 1888, Edison was already married to Mina Miller since two years.
In post-production credits, there is a typo: "coordinators" are listed as "coorindators".
The film is set in a time period spanning the 1880s and 1890s. Maps shown in the film show the states of Utah, Oklahoma, New Mexico, and Arizona, which didn't become a state until between 1896 and 1912.
The movie depicts the electric chair electrocution of William Kemmler as if it happened at the same time as the opening of the Columbian Exposition in Chicago but Kemmler was executed in 1890 and the Columbian Exposition opened in 1893.
Most of the railroad equipment shown is British and the story in set in the US.