DescriptionThis photo shows a group of factory workers pausing to take a photograph. In the background the audience can see the machines and the arrangement of the assembly line.
Time PeriodThe Emergence of Modern America (1890-1930)
DescriptionEdison cautery batteries were specially designed to meet the large and increasing demand of physicians and surgeons for a reliable battery capable of furnishing a very heavy current for cautery work. ...
DescriptionThomas Edison began serious research into developing a practical incandescent lamp in 1878. Edison filed his first patent application for "Improvement In Electric Lights" on 14 October 1878. After...