清代“宣铜”名物考

"宣铜"一词在明清文献中多有记载,其涵义至少有两种以上。作者通过科学的无损检测,同时结合对清宫旧藏实物的分析,基本可以推定古籍和档案中多次出现的"宣铜"的质地应该是黄铜。"宣铜"器的样式多种多样,清朝器物可以分为炉、彝器和杂式三大类,其下又可以分成若干式。清朝"宣铜"器款识丰富,工艺风格独特。     

几种罕见的黄铜钱币锈蚀产物的识别与形成原因探析

我国从明中期开始使用黄铜钱币,一直到清末。过去,对古代铸币的科学研究主要集中于合金成分分析和铸造工艺两方面,对锈蚀产物和锈蚀机理的研究主要针对青铜铸币。黄铜的合金元素中较青铜多锌元素,其腐蚀产物与腐蚀行为较青铜有一定的差别,也较青铜更为复杂,然而现有的文献关于此方面的研究匮乏,特别是对于大气保存环境下黄铜钱币的锈蚀产物及锈蚀成因的研究基本空白。本研究通过多种分析手段包括X射线荧光分析仪(XRF)、扫描电镜能谱仪(SEM-EDS)和显微激光拉曼光谱仪(Raman)对国家博物馆馆藏一批传世明清各时期的黄铜钱币合金组成,不同颜色的锈蚀产物等开展科学分析。研究结果表明,嘉靖、隆庆和万历年的黄铜铸币,为Cu+Sn+Pb+Zn四元合金,平均含量Cu 66.4%,Sn 6.8%,Pb 10.4%,Zn 15.6%,并含有微量Fe,不含As。泰昌、天启和崇祯年间及清代各时期的黄铜铸币,主要为Cu+Pb+Zn三元合金,并含有微量Fe、As和Sn。这批黄铜锈蚀产物与常见的青铜锈蚀产物不同,最典型的是钱币表面蓝绿色和白色锈蚀物,经Raman和SEM-EDS分析并结合相关文献初步确认蓝绿色锈蚀物为一种含铜、钠...     

Rethinking Mississippian copper symbol badges: two previously unreported examples from east Alabama

ABSTRACT

Traditional interpretation of Mississippian copper symbol badges is that they were prestige items associated with both inherited and earned status. In this article we review the current state of knowledge regarding copper symbol badges, introduce two previously unreported examples from the Big Tallassee (1MC1) and Abercrombie (1RU61) sites, and propose a new interpretation for the circulation and disposition of copper symbol badges during the Mississippian and Protohistoric periods. We argue that these objects were initially incorporated into headdresses (worn in both life and death) at major Mississippian towns and then were later transformed into inalienable possessions associated with particular beings, people, or places as large polities collapsed and new political entities were formed.     

Iron-57 Mössbauer spectral studies of medieval stained glass

⁵⁷Fe Mössbauer spectral data for six excavated and two simulated medieval stained glass samples are reported. Iron-containing precipitates are observed in the two simulated medieval glasses and are responsible for the amber colour of these samples. The ferrous/ferric ratio of the other samples is dependent on the glass composition and glass making conditions. The green glasses are associated with the presence of both ferrous and ferric iron, the ratio being very similar in three of the glasses studied, while in the purple and emerald green glasses the iron which is constitutionally incorporated in the glass is solely in the ferric oxidation state. The UVvisible spectra of some of the glasses are used to assist in interpretation of the colourant action of iron, and the role of Mössbauer spectroscopy in linking separate glass fragments with a common source is also indicated.     

Copper and other sheathing in the Royal Navy

The Royal Navy's use of copper and other sheathing on ships as a protection against'worm'is presented against a general background of the subject. Manufacturers', Admiralty and other marks found on metal sheathing are illustrated and identified as an aid to nautical archaeologists. © 2000 The Nautical Archaeology Society     

The Trade in Individual Maps from Ortelius’s Theatrum orbis terrarum after 1612

In 1612, following the death of the Antwerp print publisher Jan Baptist Vrients, Balthasar I and Jan Moretus II, at the time the managers of the Plantin Press, bought the copper plates used to print Abraham Ortelius’s Theatrum orbis terrarium, together with the remainder of Vrients’s stock of the atlas. Subsequently, they reissued various editions of the Theatrum, selling them under their own names. They also traded in individual maps from the Theatrum, printing more when necessary. Hundreds of maps were sent to clients all over Europe. This article gives an overview of this so far unknown distribution of Ortelius’s maps in the first half of the seventeenth century.