Vintage German Brass Dome Clock with Rotating Pendulum

• 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.
• Ivory - Ivory is a hard white material that comes from the tusks of elephants, mammoth, walrus and boar, or from the teeth of hippopotamus and whales. The ivory from the African elephant is the most prized source of ivory. Although the mammoth is extinct, tusks are still being unearthed in Russia and offered for sale.
  
  Ivory has been used since the earliest times as a material for sculpture of small items, both in Europe and the east, principally China and Japan.
  
  In Asia ivory has been carved for netsuke, seals, okimono, card cases, fan supports, animals and other figures and even as carved tusks.
  
  In the last 200 years in Europe ivory has been used to carve figures, for elaborate tankards, snuff boxes, cane handles, embroidery and sewing accessories, in jewellery and as inlay on furniture. Its more practical uses include being used for billiard balls, buttons, and a veneers on the top of piano keys.
  
  The use and trade of elephant ivory have become controversial because they have contributed to Due to the decline in elephant populations because of the trade in ivory, the Asian elephant was placed on Appendix One of the Convention on International Trade in Endangered Species (CITES), in 1975, and in January 1990, the African elephant was similarly listed. Under Appendix One, international trade in Asian or African elephant ivory between member countries is forbidden. Unlike trade in elephant tusks, trade in mammoth tusks is legal.
  
  Since the invention of plastics, there have been many attempts to create an artificial ivory
• Floral Swag / Garland / Festoon - Floral swags are a decorative motif often used in the ornamentation of various objects, such as silverware, glassware, and furniture. The term "swag" refers to a garland or wreath of flowers, foliage, or other decorative elements, which is usually arranged in a loop or curve.
  
  Floral swags can be found in a variety of decorative styles, from ornate Baroque and Rococo designs to more naturalistic Art Nouveau and Art Deco styles. They are often used to add a touch of elegance, refinement, or whimsy to an object, and can be seen on a range of items from chandeliers and candlesticks to picture frames and tea sets.
  
  In the decoration of silver objects, floral swags are often used to accentuate the curves and lines of the piece, and to add visual interest to the surface. Similarly, on glass objects, floral swags may be used to frame or highlight a particular area of the object, or to add a touch of color and delicacy.
  
  On furniture, floral swags can be found on a variety of pieces, from cabinets and armoires to chairs and sofas. They are often used to enhance the lines and curves of the furniture, and can be used to create a sense of movement and flow in the design.
  
  Overall, floral swags are a versatile decorative element that can be adapted to a range of styles and applications, and have been used in the decoration of various objects throughout history.

This item has been included into following indexes:

• clocks, type - under glass dome 198
• meat covers / food covers / dish covers - pewter 1,609