The relationship between enamelling on ceramics and on glass in the Islamic world

In a recent paper, Mason et al. (2001) demonstrated that enamels on mina’i ware, a Persian ceramic of the 12th century, were applied using a special firing of short duration. A similar principle was exploited to enamel glass, beginning in Syria in about the same period. This gives new credence to the long‐standing idea that the origin of enamelling on glass resulted in part from an interaction between glass workers and potters.     

Reconciling beauty and utility in early city planning: the contribution of John Nolen

In the history of city planning, the dichotomy between the aesthetic aspirations of the City Beautiful and City Practical movements is overstated. The aesthetic impulse did not disappear but persisted as an important thread through the development of comprehensive planning approaches into the 1920s. The nexus between beauty and utility was negotiated and expressed across four main discourses: broad social improvement, aesthetic functionality, economic rationality, and holistic design. Ultimately, beauty became wedded to utility within the very nature of the comprehensive city plan itself. The work of the leading city planner John Nolen is central to an understanding of these historic continuities and informed the early evolution of city planning theory and practice. Nolen’s challenge to the City Beautiful paradigm, while still retaining an artistic sensibility, reaestheticizes scholars’ appreciation of the City Practical.     

A Quasi Non‐destructive Microsampling Technique for the Analysis of Intact Glass Objects By Sem/edxa

A novel sampling technique for the analysis of glass is described, which involves the removal of minute particles from an object with a diamond‐coated file, followed by energy‐dispersive X‐ray analysis in the scanning electron microscope (SEM/EDXA). The particles are fixed to adhesive carbon discs and carbon coated without grinding or polishing. Mean compositions are determined for 10 arbitrarily selected particles above a minimum grain size of 150 mm and normalized to totals of 100%. Tests were carried out on two standard soda–lime–silica glasses of well‐characterized composition, using two files of different grade. The analyses showed good agreement with the accepted values of all elements. Although the precision is somewhat reduced, this highly portable and quasi non‐destructive microsampling procedure provides almost the same information as that gained from samples embedded and polished in the normal way. Its application is thought to be especially useful for the investigation of intact glass objects and ceramic glazes.     

The making of a city campus

Campus spatial development has attracted relatively little scholarly research, yet through time major moves reflect and interact with broader policy, design, and societal trends. The city campus as a high‐density, mixed‐use knowledge precinct has emerged as a distinctive type. Its growing prominence points to the convergence of interdependent trends in urban life, higher education, and economic growth. This article describes, contextualises, and reflects upon the physical evolution of the University of Technology Sydney (UTS) in central Sydney. The narrative identifies several distinct development phases: from the urban renewal of a rundown inner‐city precinct through comprehensive replanning following the tenets of high modernism, then adaptive reuse and heritage conservation, to architectural design excellence. In the process, it has become an Australian exemplar of a “tech transformed” contemporary city campus.     

Glass in African Archaeology: A New Methodology Offers New Opportunities

African Archaeological Review -     

A Methodology for Assessing the Heritage of Planned Urban Environments: An Australian Study of National Heritage Values

Although urban planning has made strategic and notable contributions to the production of the built environment, these are under‐represented in heritage discourse. Planned environments deserve more attention as a particular class of place because a better understanding of planning and planning excellence can inform best heritage practice. A stepwise methodology for the heritage assessment of planned environments is presented. It is drawn from an Australian study concerned with the identification of places of possible national heritage significance. The approach is constructed around the identification of historical themes (for the categorisation and benchmarking of places based on historical research), indicators (pertaining to the nature of significance in planning terms) and thresholds (pertaining to the degree of significance). The analytical approach is capable of adaptation to diverse settings in which the heritage contribution of planning may be recognised.     

Cold War heritage and the planned community: Woomera Village in outback Australia

The heritage of the Cold War is attracting increasing international interest. Much of that revolves around technological legacies; less attention has been paid to the community infrastructure which supported defence research, weapons testing and military installations. Security and operational logistics meant that research and development was conducted not only in restricted settings but also in often geographically remote situations. An archetypal example is the Woomera Rocket Range in outback South Australia, where long-range weapons were trialled from 1947 under a joint project between the British and Australian governments. Woomera Village, established as a planned residential facility to support personnel employed on the Range, survives today in a similar role, but with a population greatly diminished from its late-1960s heyday. This paper introduces the Village against the backdrop of Cold War heritage and spatial planning ideology, surveys its raison d’être and growth as a Cold War town, and considers its modern-day status as a heritage place and sustainable community.     

The origins of two purportedly pre-Columbian Mexican crystal skulls

The well-known life-size rock crystal skull in the British Museum was purchased in 1897 as an example of genuine pre-Columbian workmanship, but its authenticity has been the subject of increasing speculation since the 1930s. This paper is concerned with the history, technology and material of the skull and another larger white quartz skull, donated recently to the Smithsonian Institution. Manufacturing techniques were investigated, using scanning electron microscopy to examine tool marks on the artefacts, and compared with Mesoamerican material from secure contexts. A Mixtec rock crystal goblet and a group of Aztec/Mixtec rock crystal beads show no evidence of lapidary wheels. They were probably worked with stone and wood tools charged with abrasives, some of which may have been as hard as corundum. Textual evidence for Mexican lapidary techniques during the early colonial period, supported by limited archaeological evidence, also indicates a technology without the wheel, probably based on natural tool materials. In contrast, the two skulls under consideration were carved with rotary wheels. The British Museum skull was worked with hard abrasives such as corundum or diamond, whereas X-ray diffraction revealed traces of carborundum (SiC), a hard modern synthetic abrasive, on the Smithsonian skull. Investigation of fluid and solid inclusions in the quartz of the British Museum skull, using microscopy and Raman spectroscopy, shows that the material formed in a mesothermal metamorphic environment equivalent to greenschist facies. This suggests that the quartz was obtained from Brazil or Madagascar, areas far outside pre-Columbian trade networks. Recent archival research revealed that the British Museum skull was rejected as a modern artefact by the Museo Nacional de Mexico in 1885, when offered for sale by the collector and dealer, Eugène Boban. These findings led to the conclusion that the British Museum skull was worked in Europe during the nineteenth century. The Smithsonian Institution skull was probably manufactured shortly before it was bought in Mexico City in 1960; large blocks of white quartz would have been available from deposits in Mexico and the USA.     

A Better Shade of Black: Effects of Manufacturing Parameters on the Development of Ancient Black Bronzes*

Copper alloys with controlled contents of Sn, Ag and Au were treated with methods and solutions that mimic those used in ancient and traditional procedures for the production of black bronze. Examination of the resulting patinas with colorimetry, SEM–EDS, TEM, Raman spectroscopy and XRD revealed no systematic differences according to the fabrication method, whereas patina homogeneity and colour in those alloys that did not contain precious metal were affected by superficial work. Patina microstructure determines adherence and coverage, and depends upon the solution used irrespective of the alloy composition, but the colour of the patina is mainly related to the alloy composition. Gold promotes the development of cuprite, slowing the oxidation to tenorite in the corrosion process. Gold additions produce a more uniform patina as well as a desirable blue–black tone, which is likely to have been a factor in alloy selection.