Huon Pine Wall Clock with Key and Pendulum

• Huon Pine - Named after the Frenchman who discovered the Huon River in Tasmania, it is an extremely slow growing and long living tree. Huon pine is native to Tasmania, and it can grow to an age of 3,000 years or more. The wood contains oil that retards the growth of fungi, hence its early popularity in ship-building in convict-era Tasmania. The timber is a warm yellow colour, finely grained, and was popular for household furniture in the Victorian era. Interestingly, much Huon pine furniture was made in South Australia. Huon pine is a protected species and only limited quantities are available nowadays, for craftsmen to manufacture small items such as platters, sculptures and other decorative objects.
• Pendulum - The pendulum was discovered around 1602 by Galileo Galilei, and was adopted for time keeping by the Dutch mathematician and natural philosopher, Christiaan Huygens, who excelled in astronomy, physics, and horology.
  
  The pendulum comprises a metal rod usually of brass or steel with a metal disk, known as a bob, at the end. The movement of the pendulum is driven by weights or a spring, and as a pendulum swings in a regular arc, it was found accuracy could be controlled to within a few seconds a week.
  
  Timekeeping can be adjusted by changing the height of the bob on the rod, making the pendulum either swing slower or faster.
  
  The disadvantage of the pendulum was that changes in temperature also changed the length of the pendulum, interfering with the accuracy of the clock, and so in the 18th century two types of mercurial pendulums were invented which countered the movement in the steel rod.
  
  The pendulum was the world's most accurate timekeeping technology until the invention of the quartz clock, regulated by a quartz crystal, in 1927.

This item has been included into following indexes:

• clocks, type - wall 828