AVE6329061: United States, 1930s-1940s: A white hot ingot exits a roller on a rolling machine and then enters a second roller / Bridgeman Images

AVE6329069: United States, 1930s-1940s: A machine washes v8 engine pistons / Bridgeman Images

AVE6329074: United States, 1930s-1940s: A factory worker manufactures a car part using a manually operated machine / Bridgeman Images

AVE6329077: United States, 1930s-1940s: Car parts move along a hanging track in a Henry factory / Bridgeman Images

AVE6329083: United States, 1930s-1940s: A worker on an assembly line grabs an engine part off a track and places it into an engine block / Bridgeman Images

AVE6329084: United States, 1930s-1940s: A factory worker facets brackets to a engine block on a conveyor belt / Bridgeman Images

AVE6329085: United States, 1930s-1940s: A factory worker places large metal plates onto engine blocks moving down a conveyor belt / Bridgeman Images

AVE6329092: United States, 1930s-1940s: A factory worker affixes an engine part to a v8 engine block as it moves down a conveyor belt / Bridgeman Images

AVE6329103: United States, 1930s-1940s: factory workers move finished steel car frame pieces onto a conveyor belt / Bridgeman Images

AVE6329108: United States, 1930s-1940s: Two factory workers place the steel exterior of a car roof into a machine that perfects the exterior's shape / Bridgeman Images

AVE6328514: United States, 1960s: woman holds baby in ambulance / Bridgeman Images

AVE6328533: United States, 1960s: police man leaves hospital / Bridgeman Images

AVE6328544: United States, 1960s: Montage of different wall clocks / Bridgeman Images

AVE6328545: United States, 1960s: Hand pivots clock on pedestal / Bridgeman Images

AVE6328552: United States, 1960s: Two different alarm clocks / Bridgeman Images

AVE6328560: United States, 1960s: Rotating images of timers, sundials / Bridgeman Images

AVE6328562: United States, 1960s: Two wall clocks / Bridgeman Images

AVE6328563: United States, 1960s: View of wall clock / Bridgeman Images

AVE6328576: United States, 1960s: Down shot of coffee in percolator / Bridgeman Images

AVE6328580: United States, 1960s: Hand puts bread in toaster / Bridgeman Images

AVE6328583: United States, 1960s: Toaster with toast, hand puts bread in toaster / Bridgeman Images

AVE6328587: United States, 1960s: Woman writes letter at counter, zoom out to show waffle maker / Bridgeman Images

AVE6328597: Lady Hanging Out Washing on Line as Clouds Roll by During Nuclear Explosion / Bridgeman Images

AVE6328611: United States, 1960s: Woman writes letter at table, zoom out to show floor polisher / Bridgeman Images

AVE6328615: United States, 1960s: Underside of floor polisher, pads spin / Bridgeman Images

AVE6328619: United States, 1960s: Woman scrubs floor with brush / Bridgeman Images

AVE6328624: United States, 1960s: Iron suspended on fabric, steaming / Bridgeman Images

AVE6328628: United States, 1960s: Meat cooking in electric skillet / Bridgeman Images

AVE6328629: United States, 1960s: Boy in cowboy outfit reads letter at desk / Bridgeman Images

AVE6328635: United States, 1960s: Woman setting electric skillet, bending over / Bridgeman Images

AVE6328636: United States, 1960s: Chicken in electric skillet, hand grabs piece / Bridgeman Images

AVE6328639: United States, 1960s: Meat and vegetables cooking in electric skillet / Bridgeman Images

AVE6328645: United States, 1960s: Woman wearing hair dryer cap / Bridgeman Images

AVE6328650: United States, 1960s: Woman setting hair in dryer, dancing couple appear on side of screen / Bridgeman Images

AVE6328659: United States, 1960s: Woman shaves leg with electric razor / Bridgeman Images

AVE6328663: United States, 1960s: Close up of woman's hands cutting man's hair / Bridgeman Images