Longest pendulum

According to Official Guinness Records,

The world's longest pendula were two lengths of number 24 steel piano wire, each 1,353.3 m (4,440 ft) long. They were suspended down the number 4 shaft of the Tamarack Mines, near Calumet, Michigan, USA, in September 1901. The experiment was performed by Professor Fred W. McNair (USA) and colleagues from the Michigan College of Mines, Michigan, USA. Contrary to expectations, the pendula were further apart at the bottom of the mine than at the top. The results were published in the journal Science on 20 June 1902.

For a complete list of 2005 records, please visit 2005 Guinness Records in United States.

Related Images

Other United States records that might interest you:

• First competitive use of snow body-boards
• Largest printed catalogue (standard edition)
• Oldest woman to give birth to her grandchildren
• Most concerts by a symphony orchestra
• Most expensive baseball bat sold at auction