A RARE WEDGWOOD OVAL BLUE AND WHITE JASPER PYROMETER MEDALLION AND THIRTY WEDGWOOD JASPER AND JASPER

A RARE WEDGWOOD OVAL BLUE AND WHITE JASPER PYROMETER MEDALLION AND THIRTY WEDGWOOD JASPER AND JASPER DIP CAMEOS INCLUDING THREE COLOUR EXAMPLES, 1784 AND LATER pyrometer medallion 5 x 3.5cm, glued to velvet covered board in late Victorian ebonised, gold painted and gadrooned frame, 26 x 41cm overallProvenance: Alan Paul Good (1906-1953); thence by descent to the present vendor.Entries on the 5th & 12th June 1784 in Wedgwood's Oven Book record the production of 2 dz [dozen] and 3 dz [dozen] 'Blue and white Lybols Jos Wedgwood F.F.S.'It is logical to conclude, especially since the edge is straight and not curved or chamfered, that they were made to be inset into the top of the boxes that contained the pyrometer sets invented by Josiah Wedgwood to measure the high temperatures in the kilns. It is not known whether the present example is numbered on the reverse (since it is stuck onto the velvet covered board) but that in the Wedgwood Museum is inlaid on the reverse "No 110" and another, recently sold at auction (Skinner, Boston, July 14, 2018) was numbered 144; see the exhibition catalogue The Genius of Wedgwood, Victoria & Albert Museum 1995, No, 1363.