Ohio: The study of glass. A man hangs some weight on a glass rod. Surface irregularity of glass is shown. Pure sand is shown being poured into a machine. A glass bottle is being labeled and a man puts glass bottles into an oven. Television tubes are developed. A man stands in front of huge dials and writes on a clip board. A machine that makes glass containers spits out hot glowing glass and blow it into the containers. A man lights his cigar with a piece of hot glass.