Marbled Ansonia Mantle Clock with Gilt Details

• 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.
• Marbling - A descriptive term for a finish applied to plastic, ceramics, glass, plaster or wood to imitate the colours and characteristic markings of various marble types. For moulded items such as the first three above, the marbling is within the item.
  
  Interiors and furniture were marbled from from the early 17th century to the late Victorian period. The craft was practiced by skilled decorators using a combination of brushes and sponges. Some of the finishes achieved were so realistic as to make it difficult to distinguish the marbled surface from the marble surface.
  
  Marbling is also a term applied to a finish for paper as often seen in the front and endpapers of old books. The marbling is achieved by floating the colours on water and then transferring them to paper. However the marbling finish on paper, as with the marbling finish on plastics, with its multitude of colours has little resemblance to naturally occurring marble.

This item has been included into following indexes:

• Ansonia (United States) - clocks, maker or retailer 315
• clocks, mantle & shelf, material or style - gilt metal / ormolu 536
• clocks, mantle & shelf, period or origin - American 120