Y A Regency mahogany, tulipwood banded, ebony strung and brass mounted Personal Weighing Machine or Sanctorius's Balance, early 19th century, in the manner of Thomas Weeks after the original model by John Joseph Merlin, with integral height measure, 135cm high together with a set of cup weights Provenance: From The Hon. Sir William McAlpine Collection The mechanism here was invented by Wyatt circa 1741 for the purposes of weighing vehicles, the mechanism was scaled down by Merlin. An example by Merlin is preserved in the collection of the Science Museum, London. Weeks sold his version from his museum in Titchborne street. Several examples of these have been known to come on the antique market, all signed for the maker Thomas Weeks. One was published in Mallett's catalogue in 2009.