The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source• a link is made to the metadata record in Durham E-Theses• the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. of peaks in the distribution of zinc and tin contents that represent specific alloy types which were commonly produced. The largest peak relates to the commonest alloy: bronze. The second peak relates to brass and the third to copper. All the remaining analyses fall into a diffuse area between the bronze and the brass peaks, and these are referred to by the modern term gunmetal.It is clear that copper alloys were recycled and that some care was taken over the ways in which this occurred. The lack of low zinc brasses shows that this alloy was rarely recycled on its own. If brass was recycled then it was always mixed with some bronze. The proportions of bronze and brass that were mixed varied widely as there is no distinct peak within the distribution of the zinc and tin contents of gunmetals.The thesis uses this overall view of Roman copper metallurgy (and that derived from previous work) to examine changes in alloy production and use. The results (interpreted in the light of metallurgical theory and practice, and of wider archaeological theory and data) challenge many of the traditional accounts of chronological and cultural change, and of the deposition processes operating in the Roman period.
This article reviews the nature of window glass employed in historic buildings in England over the past fi ve centuries and presents new results on the nature of that glass. Chemical analysis of available samples has shown that window glassmaking technologies have changed over time. This provides information which can be used to identify the period of the manufacture of particular panes of glass. It is hoped that the use of chemical analysis to date historic window glass in this way will be used to enhance building conservation decisions.
Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.
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