Friction

Titles. 08:10:59 Girl pulling brother on sled down road in light snow. Stuck on bare spot. 08:11:38 Experiment rubbing cotton over mirror & it slides, then over rough piece of wood & cotton torn loose on splinters. MCU sled over ground. 08:12:56 CU of feet walking on sidewalk in sunshine. MCU soles of shoes w/ hole in one sole. CU of wheels on road; worn out tires in pile. Dull knife trying to cut meat. Pencil lead worn down. 08:13:40 Automobile junkyard panned across. 08:13:53 Railroad steam engine; heavily greased driving assembly leaving past camera. CU of watch; watch w/ back off showing mechanism working. Arrows point to jewels. 08:14:48 Fan running on four cylinder car motor. Metal bar that looks smooth; drawing illustrates that bars aren’t so smooth & can cause friction. Oil as a means of two pieces sliding smoothly. 08:15:48 Putting oil into car; greasing on service station automobile lubrication rack; sewing machine, bicycle, roller skates being oiled. Pushing keg / barrel, then putting on side and rolling. Diagram of rollers. Using dolly to move box. 08:17:21 Semi-truck on highway; railroad engine in CU in yard. Cars past from low angle in city. 08:17:53 Ball bearings in bicycle. Door knob & needing cloth to dry hands to turn. Bottle caps w/ ridges to increase friction. Auto tires for friction. Scooter using a friction brake. 08:19:21 Coupe car suddenly brakes, feet onto pedal & stopping. 08:19:33 MCU of feet walking; animation of man walking. 08:19:45 Girl at blackboard writing. Bridge w/ rainy surface & cars across. Boy Scout using friction to start fire. The End. Science; Physics; Educational Films; Auto wrecking yard; Transportation; 1950; 1950s;