THE PROVENANCE OF IRON ARTEFACTS FROM MANCHING: A MULTI‐TECHNIQUE APPROACH*

Iron finds from the Celtic oppidum of Manching in southern Bavaria (Germany) are analysed in view of their possible provenance. The exceptional size and the location of Manching are usually attributed to the presence of abundant iron ores in its vicinity. After a review of previous approaches for source determination of iron artefacts, we introduce lead isotope analysis as a new approach. However, only by combining the trace element patterns of slag inclusions and iron metal with lead isotope ratios in the metal is it possible to distinguish various iron ore formations near Manching. As a result, it turns out that, indeed, the most obvious ones—namely, bog ores near the Danube—constituted the main resources for iron production at Manching. It was even possible to select one occurrence as the most likely ore source.     

Breaking Ground: Hoes in Precolonial South Africa—Typology,Medium of Exchange and Symbolic Value

In sub-Saharan Africa, every cultivator of the soil in a precolonial, agriculturist society needed a digging implement, and this normally took the form of a hoe with an iron blade hafted on a wooden handle. This paper marks the first attempt to document the surprising variety of hoe blade styles and map their regional distributions within South Africa. While the primary function of the hoe—this key item of material culture in African farming communities—was to cultivate the soil, the large quantity of metal and therefore labour required to make a hoe blade accorded it great value in the years before European industrial copies flooded the market. The hoe was an important item in trade networks, in marriage transactions and in a number of symbolic contexts associated with individual and collective ancestry. This biographical approach to hoe exchange, use and recycling reveals the complex significance of this tool in the lives of precolonial farmers. In particular, we are able to show that hoes could in some circumstances be accorded the same values as cattle in marriage exchange.     

18th- and 19th-century shipyards at the south-east entrance to the West India Docks, London

Archaeological fieldwork in 1997 on the Isle of Dogs, at the south-east entrance to the West India Docks, recovered evidence of 17th- to 19th-century shipyards, associated activities and foreign trade. Reused timbers may be the remains of the 17th-century Rolt's yard. Reclamation along the natural inlet was accompanied by the construction of a timber dry dock probably in the late 18th century. This soon fell out of use and was filled in with the construction of new dry docks to the south in 1806 by Thomas Pitcher. Much of the debris dating to the first half of the 19th century from ship repairing and building and from a range of ancillary crafts, together with ceramics from Iberia and the Far East, probably came from Pitcher's yard.     

5,000 years old Egyptian iron beads made from hammered meteoritic iron

The earliest known iron artefacts are nine small beads securely dated to circa 3200 BC, from two burials in Gerzeh, northern Egypt. We show that these beads were made from meteoritic iron, and shaped by careful hammering the metal into thin sheets before rolling them into tubes. The study demonstrates the ability of neutron and X-ray methods to determine the nature of the material even after complete corrosion of the iron metal. The iron beads were strung into a necklace together with other exotic minerals such as lapis lazuli, gold and carnelian, revealing the status of meteoritic iron as a special material on a par with precious metal and gem stones. The results confirm that already in the fourth millennium BC metalworkers had mastered the smithing of meteoritic iron, an iron–nickel alloy much harder and more brittle than the more commonly worked copper. This is of wider significance as it demonstrates that metalworkers had already nearly two millennia of experience to hot-work meteoritic iron when iron smelting was introduced. This knowledge was essential for the development of iron smelting, which produced metal in a solid state process and hence depended on this ability in order to replace copper and bronze as the main utilitarian metals.     

Global Media Cities in a World-wide Urban Network

This article examines the link between cities and culture from the point of view of the production of cultural goods, including media products. It focuses on the institutional structure of present-day cultural production and the media industry and on their geographical organization at the local and global levels. The cultural economy is a prime mover for globalization processes in the urban system, in which cultural production clusters act as local nodes in the global networks of the large media groups. The models frequently used to analyse the global city system will be supplemented and partially modified by an empirical analysis of the 'world media cities'. The analysis of the world media cities enables those locations to be identified, from which globalization in the spheres of culture and the media proceeds and is 'produced' in practical terms. Global city research has predominantly emphasized the role of advanced producer services—in contrast this article concludes that for the process of globalization the globally operating media firms are at least as influential as the global providers of corporate services, because they create a cultural market space of global dimensions, on the basis of which the specialized global service providers can ensure the practical management of global production and market networks.     

Home as a Pocket of Local Order: Everyday Activities and The Friction of Distance

Discourse on the information society currently highlights issues of networks, flows and mobilities as prime organizers and re‐organisers of time—space relationships. Such discourse promotes notions of the flexible use of time and space, of people's decoupling from place and even of the end of geography — the belief that distance does not matter. Yet, in this article we argue that the roles of geographical stationarity and proximity in everyday life — understood as the creation and maintaining of pockets of local order — indicate the continuing and often neglected importance of the friction of distance. We demonstrate this empirically by focusing on the home as a pocket of local order, investigating the intensity and spatial extension of people's everyday activities, projects and contacts — their corporeal, virtual and medial (media‐related) mobilities — with the world outside. We support our thesis with data from the population, household and individual levels.     

TOOLS TO QUALIFY EXPERIMENTS WITH BLOOMERY FURNACES*

Five experimental bloomery iron ore smelts were carried out in a reconstruction of an early medieval furnace of the Boécourt type (Switzerland). A part of the bloom from the most successful experiment was forged to a billet. Starting materials and products were weighed, described and chemically characterized (ICP-MS, LA-ICP-MS and WD-XRF). The calculation of the yield and mass balance based on the chemical analyses from the ore (optimum) and from the ore, furnace lining, slag and ash (applied) allow the determination and quantification of the materials involved in the process. This permits the interpretation of the quality of the experiments. The chemical characterization of metal produced from hematite ore from the Gonzen Mountains in Switzerland gives archaeologists the possibility to compare the metal of iron artefacts to metal from this mine. Finally a good agreement between experiments and archaeological reality can be shown.     

Metallurgical Characterization of A Coated Roman Iron Coin By Analytical Investigations

A coated Roman iron coin from Villa Loig in Salzburg, Austria was investigated. The coating is a copper alloy consisting of Cu, Pb, Sn, Zn and negligible amounts of Ag, a variant of gunmetal known as ‘leaded red brass’. The numismatic term for such a coin is subferratus (Latin). From an archaeometallurgical point of view, information about the chemical composition, the microstructure and the manufacturing technique are of interest. To achieve these objectives, different analytical techniques and metallographic examinations were applied. Droplet‐shaped iron inclusions were observed in the red brass coating, while at the grain boundaries, inside the iron core, copper and lead were detected (liquid metal embrittlement). The dendritic microstructure of the coating, the spheroidal‐shaped iron inclusions in the coating and the liquid metal embrittlement show that the iron coin was plated by immersing it in a molten copper alloy. The iron core is a low‐carbon steel with slag stringers, both of which are characteristic of a bloomery iron. Deformation twins (Neumann lines) were observed in the microstructure of the iron core and indicate that the coining was performed after the flan was cooled.     

The Chemical Environment in a Burial Mound Shortly after Construction—An Archaeological–Pedological Experiment

A number of burial mounds from the South Scandinavian Early Bronze Age have contained iron pan encapsulated, wet mound cores, in which organic material has been extraordinarily well preserved. Chemical analysis of iron pan formations in recently excavated burial mounds from Jutland, Denmark have demonstrated that the iron pans were formed by redox-processes, caused by anaerobic conditions in the core of the mound and possibly influenced or determined by the way the mound was constructed. In 1995 an experimental burial mound was erected at the Historical-Archaeological Research Centre at Lejre in Denmark. The purpose of the experiment was to test and elaborate the theories on the iron pan formation and the mound construction developed on the basis of the previous chemical analysis. Three years after construction the mound was excavated and the iron pan formation and the preservation of organic matter in an oaken log coffin were studied. Anaerobic conditions had developed in the mound core and the contents of the oaken log coffin were found to be well preserved. This paper describes the results of the experiment.     

Steel of Victory,Scrap of Defeat: Mobilizing the French Home Front, 1939–40

This article traces the implementation, execution, and results of the French Ministry of Armaments’ scrap iron collection drive from September 1939 to June 1940. This collection drive was a belated effort to mobilize patriotic sentiment and raw materials for France’s war effort. By the late 1930s, the French government realized that it did not have — and, more importantly, would not be able to acquire — enough metal to meet ambitious armament plans. In September 1939, Raoul Dautry, the Minister of Armaments, began moving toward a controlled economy by setting up central distribution organizations, preventing the movement of stocks, and organizing the national scrap drive, modelled, in part, on Germany. Despite a rural distrust of the state and cases of individuals hoarding metal, most people responde­d to the call. Yet logistical difficulties in finances, manpower, and transportation hampered efforts. By May 1940, half of the 85,000 tons collected remained piled on the platforms of railway stations. With the invasion, the Germans immediately confiscated this metal. With the defeat of France, this failed drive came to symbolize France’s defeat and humiliation, as well as the impotence of the Third Republic.     

More Evidence for an Advanced Prehistoric Iron Technology in Africa

Abstract

Ethnographic and technological observations of iron smelting among the Raya people of NW Tanzania during 1976 and 1979 have contributed important new evidence for a technologically advanced culture in East-Central Africa. The ethnoarchaeology of Haya iron working shows that the Raya practiced an iron-smelting technology that employed preheating of the air blast—a highly efficient technique—and formed a massive steel altogether different from that known in the European tradition of iron production.

Excavations in 1977 at the KM2 site near Kemondo Bay west of Lake Victoria in Kagera Region, Tanzania, provided abundant evidence for an ancient technology, dating to the first six centuries A.C., that shared many similarities to the living iron-smelting technology. Excavations during 1978–1979 at the KM3 site, also located near Kemondo Bay, yielded physical evidence for the antiquity of the preheated process and provided definitive proof for a technology similar to the process in historical times. These discoveries affirm that one of the most advanced technologies in the ancient world developed in Africa independent of European influence.     

Mechanisms of Control in Emergent Interorganizational Networks

The delegation of decision‐making capacity from one actor to another—known variously as authority or control—is a central phenomenon of organizational sociology. Despite its theoretical and practical significance, however, the dynamics of control within disrupted settings (such as disasters) remain poorly understood. Here, we shed light on this question by a reexamination of historical data on multiorganizational disaster response networks, using recently developed statistical methods for robust inference from error‐prone informant reports. Specifically, we test competing hypotheses about the relationship of control during the response process to the structure of interorganizational communication. We find that both the realized and normative response hierarchies are likely shaped by coordination among both nonadjacent alters and along indirect channels. Our results suggested that the communication structure of these networks is consistent with a control at a distance model of command. This article makes a substantial contribution to understanding the role of network structure in the emergence of control between organizations in disrupted settings. Additionally, our innovative approach to network inference will guide researchers in dealing with error‐prone data in their own research on policy networks.     

An innovative methodology of assessing the climate change impact on cultural heritage

Climate change is expected to have a severe impact on cultural heritage in the future. This study presents the methodology developed during the FP7 project Climate for Culture, of assessing the climate change impact on collection objects in cultural heritage buildings. The main innovation lies in coupling new high resolution future climate projections with building simulation tools in order to predict future indoor climate and identify future risks in historic buildings. The case study is an intermittently heated wooden chapel in Croatia. The whole building simulation model of the chapel was validated using a newly developed method of accuracy assessment in the context of preventive conservation. Even though modeling intermittent heating induces limitations in the model, it can be used for computing of future indoor data. Future indoor climate data was assessed for possible risks of biological, mechanical, and chemical damage to painted wooden panels using the newly developed specific climate risk assessment. When using this method of damage assessment on buildings with active climate control, especially with intermittent heating, it is recommended to determine the relevant season for the damage process in order to objectively analyze results.     

Combining residue analysis of floors and ceramics for the study of activity areas at the Garum Shop at Pompeii

In this paper, we propose the application—for the first time in the Mediterranean area—of the combination of the study of chemical residues in floors and ceramics, with the aim of providing information about the activities carried out in archeological buildings. We chose the Garum Shop at Pompeii to test the method. In fact, due to the peculiarity of this archeological context, it provided an ideal case in which the activities performed are in part known, and the ceramic vessels recovered are still in situ. Floor samples were studied by means of spot tests developed in Mexico aimed at identifying the presence of phosphates, fatty acids, and protein residues, while the organic residues preserved in the ceramic matrix of amphorae, dolia, and other ceramic vessels were studied by gas chromatography coupled with mass spectrometry. Moreover, we integrated the data obtained with specific studies directed at better identifying the solid residues found inside two of the amphorae studied: botanical studies of fruit stones recovered in a Dressel 20 amphora and the characterization of the lime preserved in an African amphora. The research allowed for the identification of the traces of some of the activities performed, such as cooking and producing garum in the floors of the building, and the use and re-use of amphorae and dolia before the Vesuvian eruption.     

Iron Production in North Pare,Tanzania: Archaeometallurgical and Geoarchaeological Perspectives on Landscape Change

Archaeology, archaeometallurgy and geoarchaeology are combined in this research to examine the chronology and development of iron metallurgy and its environmental repercussions in North Pare, Tanzania. Pare was a prominent centre for iron production from at least the second half of the first millennium AD, and it has been assumed that this technology—with its demand for wood charcoal—had a significant and detrimental effect on local forest cover. This research sought to examine this claim by exploring the spatial, chronological and technological characteristics of iron production in Pare in conjunction with geoarchaeological evidence. Contrary to older assumptions, our results demonstrate that erosion processes were well established in North Pare before the documented intensification of smelting and smithing activity, and that iron production continued despite environmental changes. We suggest that although iron production may well have contributed to deforestation and erosion in Pare, it is unlikely to be the sole causal factor.     

Early ironworking in Iron Age South India: New evidence for the social organization of production from northern Karnataka

Abstract

Iron production was integral to political and ritual practices during the South Indian Iron Age (ca. 1200–300 b.c.), yet the investigation of the social relations of metals production during this period has been overshadowed by studies of iron consumption, particularly of iron objects in megalithic mortuary contexts. Recent archaeological research in the Tungabhadra River Corridor, Karnataka, has revealed iron production debris within and between settlements in more ephemeral occupational contexts, such as rockshelters. One notable discovery is the earliest ironworking facility in South India at Bukkasagara. The regional pattern suggests that iron production involved at least two classes of specialist producers—smelters and smiths—who exercised varying degrees of control over the practice and products of their craft. It also suggests that iron production was an important component in the construction and negotiation of Iron Age social differences, affiliations, and inequalities.     

A study of the Roman iron bars of Saintes-Maries-de-la-Mer (Bouches-du-Rhône,France). A proposal for a comprehensive metallographic approach

The aim of this paper is to contribute to the understanding of the organisation of the manufacture and circulation of iron bars and the possible bar standardisation of a given set of artefacts in order to throw more light on commercial patterns during Antiquity. A set of 48 iron based metal bars originating from the Roman shipwrecks at Les Saintes-Maries-de-la-Mer (France) has been studied using comprehensive metallographic observations, ranging from macroscopic to microscopic scales and slag inclusion (SI) analyses. A comparison of the results allows one to distinguish different metal qualities (inclusions, pores, welding, carbon content) that may be linked to morphological types, which shows the possible standardisation of this set of artefacts. Moreover, SI analyses allow distinguishing various origins for the Primary Pieces of Metal, thereby throwing light on a specific organisation of the iron bar production line during the late Roman period.     

Baseline Models for Two‐Mode Social Network Data

Baseline models have been used in the analysis of social networks as a way to understand how empirical networks differ from “random” ones. For the purposes of social network analysis, a “random” network is one chosen—at random—from a population of possible graphs derived from a given generating function. Although these principled hypothesis tests have a long history, many of their properties and extensions to multiple data structures—here, specifically two‐mode data—have been overlooked. This article focused on applications of different baseline models to two data sets: donations and voting of the 111th U.S. Congress, and organizations involved in forums on watershed policy in San Francisco, USA. Tests using each data set, but with different baseline reference distributions, will illustrate the range of possible questions baseline models can address and the differences between them. The ability to apply different models and generate a constellation of results provides a deeper understanding of the structure of the system.     

Local Histories in Global Perspective: A Local Elite Fellowship in the Port City of Quanzhou in Seventeenth-Century China

The Great Mosque of Quanzhou, as a distinctive community center, bound its residents through religious, professional, and educational ties; it also linked the mosque community to other communities with bonds of shared Muslim identity and minority status. The Great Mosque was rebuilt in 1609 under the supervision of the Confucian scholar Li Guangjin. This significant event is evidence of a local elite fellowship in seventeenth-century Quanzhou consisting of three well-known Confucian scholars—Li Zhi, Li Guangjin, and He Qiaoyuan—who had close ties to their Muslim neighbors. They left meticulous records of merchants, particularly Muslim traders. This paper focuses on the fellowship among the three men in order to investigate Quanzhou’s connections to the broader world of global commercial and religious networks and to look more closely at local community life.     

In the Nature of the Non‐City: Expanded Infrastructural Networks and the Political Ecology of Planetary Urbanisation

This paper proposes extending Urban Political Ecology's (UPE) ideas about the urbanisation of nature in order to include the geographical imprints of expanding, global metabolic flows of matter, energy and capital. It does so through the analysis of Huasco, a small agricultural village in northern Chile that has been overburdened with massive energy undertakings aimed at powering the operations of mines that supply raw materials to international markets. Like the sewage and technological networks that feed the life of cities, the paper argues that Huasco—as a metabolic vehicle of planetary urbanisation—has also been hidden from view, and thus the fetishisation of urban infrastructural networks initially theorised by UPE, has been ratcheted‐up to the global level by the mediating powers of neoliberalising capitalism. Just as the socio‐material arrangements that facilitate the smooth functioning of the modern city and household are riddled with glitches and exclusions, the paper suggests that globally up‐scaled infrastructures reveal even larger contradictions that put into jeopardy the very premises upon which the ongoing commodification of nature is grounded.