George IV Barometer/Thermometer by L. Butti, Edinburgh

• Mahogany - Mahogany is a dense, close grained red-coloured timber from the West Indies and Central America. It was first imported into Europe in the the early 18th century and its use continued through the 19th century. It was popular for furniture making because of its strength, the wide boards available, the distinctive grain on some boards, termed flame mahogany and the rich warm colour of the timber when it was polished.. The "flame" was produced where a limb grew out from the trunk of the tree, and this timber was usually sliced into veneers for feature panels on doors, backs and cornices.
  
  Some terms used to describe mahogany relate to the country from which it originally came, such as "Cuban" mahogany, "Honduras" mahogany etc. However unless the wood has been tested the names assigned are more a selling feature, rather than a true indication of the timber's origin.
• George Iv - George IV (1762 ? 1830) was king of the United Kingdom of Great Britain and Ireland and king of Hanover from 1820, until his own death in 1830. From 1811 until his accession in 1820, he served as Prince Regent during his father's final mental illness.
  
  In English furniture design, his reign from 1811 to 1830 is known as the Regency period.

This item has been included into following indexes:

• barometers, period or origin - Georgian, Regency, Sheraton 49
• barometers, type - barometers with thermometer 109