Multi-disciplinary Investigation of the Windows of John Thornton, focusing on the Great East Window of York Minster

Twenty-seven samples of glass from panel 2e of John Thornton’s Great East Window (1405–1408) at York Minster have been analyzed using energy dispersive x-ray analysis in the scanning electron microscope. This paper highlights our findings. Inserts and replacements of early modern and medieval glass have been identifi ed. White (colorless) and colored medieval glass differ significantly in composition, suggesting diff erent sources. Eleven samples of white glass original to the window are identical within analytical error, suggesting they came from the same batch, but the head of Christ is from another panel. Blue and flashed red glass were each the product of more than one batch of melting. Primarily, the condition of the glass is dependent upon silica content. Further investigations of other panels from the Great East Window, and of other windows by Thornton, are ongoing

Occurrence of phosphatic corrosion products on bronze swords of the Warring States period

Corrosion products on three bronze swords found in tombs dating from the Warring States period at Lijiaba site, Yunyang county, Chongqing were characterized by Raman and X-ray fluorescence spectroscopies. The major corrosion products were cuprite, malachite, cerussite and cassiterite, along with the copper and lead phosphates, libethenite and pyromorphite. The presence of libethenite and pyromorphite which have been reported infrequently in bronze corrosion products were attributed to the pH, humidity and phosphorus released by the decomposition of the adjacent bodies in the burial environment

Glass analysis

This book explores the economic evidence for the settlement at Bornais on South Uist. It reports in detail on the large assemblages of material found during the excavations at mounds 2 and 2A. There is important evidence for craft activity, such as bone and antler working and this includes the only comb making workshop from a rural settlement in Britain. A large proportion of the copper alloy, bone and antler assemblages comprise pieces of personal adornment and provide important information on the dress and thereby social relations within the settlement occupation. There is a large assemblage of iron tools and fittings, which provides important information on the activities taking place at the settlement. The information derived from the artefact assemblages is complemented by that provided by the ecofactual material. Large amounts of animal, fish and bird bones plus carbonised plant remains provide detailed information on agricultural practices, and the processing, preparation and consumption of foodstuffs. It is clear that the Norse inhabitants of the settlement had access to a much richer variety of resources than had been exploited before the Viking colonisation of the region. The settlement also had a significantly wider range of connections; material culture indicates contacts to the south with the Irish Sea ports and Bristol, and to the north with Shetland and the Viking homelands of Norway. The evidence produced by these excavations is exceptional and provides an unparalleled opportunity to explore medieval life in the Scandinavian kingdoms of Western Britain

Analysis of the glass and glass-working waste

An assemblage of glass fragments from the Tarbat monastery excavations were analysed by SEM-EDXA. Of the blue glasses, two are modern. The third is a natron-type glass of Roman type which is likely to represent re-use of early material by early medieval craftsmen. The remaining three glasses (all opaque yellow) are unambiguously consistent with early-medieval glass technology. However, it was not possible to establish whether opaque yellow glass was being made at Tarbat, or simply being worked there

Dating Nathan: The Oldest Stained Glass Window in England?

Relatively little is known about stained glass windows in England predating c. 1170; however, art-historical evaluation by Caviness (1987) argued that four figures from the “Ancestors series” of Canterbury Cathedral, usually dated to the late 12th and early 13th century, in fact date earlier (c. 1130–1160). This would place them amongst the earliest stained glass in England, and the world. Building on our previous work, we address Caviness’s hypothesis using a methodology based upon analysis of a few, well-measured heavy trace elements and a 3D-printed attachment for a pXRF spectrometer that facilitates in situ analysis. The results confirm two major periods of “recycling” or re-using medieval glass. The first is consistent with Caviness’s argument that figures predating the 1174 fire were reused in the early 13th century. The results suggest that in addition to figures, ornamental borders were reused, indicating the presence of more early glass than previously thought. In the second period of recycling (1790s), surviving figures from the Ancestors series were removed and adapted into rectangular panels for insertion into large Perpendicular-style windows elsewhere in the cathedral. The results show that the glasses used to adapt the panels to a rectangular shape were broadly contemporary with the glasses used to glaze the original Ancestors windows, again representing a more extensive presence of medieval glass in the windows