Springs

1950s

13167_10661_spring_time_anytime

“Spring Time is Anytime!”. Different items that use springs are shown.…

1950s

13169_10691_master_of_time1

Masters of time!: at Elgin, Illinois at an observatory. A man…

1950s

13167_10670_beryllium

Pennsylvania: Beryllium rocks being transformed in a factory into…