Henry Ford and his engineers constantly searched for ways to speed up car production and hold down costs. The integration of a moving assembly line in the Highland Park plant allowed Ford's company to do just that. From 1908-1927, Ford Motor Company produced over 15 million Model T cars and the price dropped from $850 to as little as $260.

Ford's Model T flywheel magneto generated the electricity that ignited the gasoline-air mixture inside the engine's cylinders. At the Highland Park plant, the coil-manufacturing department employed some women for the assembly of magnetos. The workers wound wire around the iron cores and placed the assembled parts into wooden boxes.

Henry Ford's River Rouge Plant, developed between 1917 and 1928, employed more than 100,000 people at its peak in the 1930s. The Rouge Plant started with raw materials and rolled a completely new vehicle off the line every 49 seconds. In this image, workers on the assembly line at the Rouge Plant join an automobile body with its chassis.