The Making of an Australian Technoburb

North Ryde in Sydney provides an instructive case study of the emergence in little over a generation of a new suburban activity centre on a greenfield site. While its image is that of a siliconised ‘technopole’, the real significance lies in the evolution of the wider locality into some-thing more akin perhaps to an American ‘edge city’. The notion of the ‘technoburb’ seems the most apposite. The evolution of North Ryde is seen as exemplifying the restructuring of metropolitan areas into multi-nucleated regions, the strategic role of the state in setting certain ground rules for development, the rise of the information economy, the impact of globalisation of economic activity, the dependent nature of the Australian economy, and the gap that can exist between image and reality in an Australian suburban ‘hi tech’ environment.     

THE PROVENANCE AND TECHNOLOGY OF NEAR EASTERN GLASS: OXYGEN ISOTOPES BY LASER FLUORINATION AS A COMPLEMENT TO STRONTIUM*

The ability to make rapid measurements on small samples using laser fluorination enhances the potential of oxygen isotopes in the investigation of early inorganic materials and technologies. δ¹⁸O and ⁸⁷Sr/⁸⁶Sr values are presented for glass from two primary production sites, four secondary production sites and a consumer site in the Near East, dating from Late Antiquity to the medieval period. δ¹⁸O is in general slightly less effective than ⁸⁷Sr/⁸⁶Sr in discriminating between sources, as the spread of measured values from a single source is somewhat broader relative to the available range. However, while ⁸⁷Sr/⁸⁶Sr is derived predominantly from either the lime‐bearing fraction of the glass‐making sand or the plant ash used as a source of alkali, δ¹⁸O derives mainly from the silica. Thus the two measurements can provide complementary information. A comparison of δ¹⁸O for late Roman – Islamic glasses made on the coast of Syria–Palestine with those of previously analysed glasses from Roman Europe suggests that the European glasses are relatively enriched in ¹⁸O. This appears to contradict the view that most Roman glass was made using Levantine sand and possible interpretations are discussed.     

The garden city idea in Australia

Ebenezer Howard's Garden City idea occupies an important place in the history of British planning, and in various guises it made a significant international impact. A preliminary exploration of the history of the idea in Australia is attempted, focussing on its meaning as a schema for social reform and on its impact on the landscape. The first two ‘phases’ saw the rise of ‘garden city principles’ to describe a model house and garden suburbia which was to redeem urban Australia. In the 1920s these ‘town planning principles’ were used mainly to sell land, but in a fourth phase beginning in the early 1930s they were refined into neighbourhood planning ideas, combining with previously neglected concepts of the satellite town and green belt to approach more closely the original vision of a garden city. This reformist text emerged as town planning was finally accorded professional respectability; however, with the ambiguous exception of Canberra, the promise of neither has been realized.     

MODELLING CHANGES IN MOLLUSC SHELL INTERNAL MICROSTRUCTURE DURING FIRING: IMPLICATIONS FOR TEMPERATURE ESTIMATION IN SHELL‐BEARING POTTERY*

Firing experiments have been carried out on a clay containing naturally occurring fragments of mollusc shell. The transformation and/or decomposition of mineral phases with temperature was monitored by thermal analysis on the starting material and compared with X‐ray diffraction data on the fired specimens. Scanning electron microscopy revealed systematic changes in the internal microstructure of the shell fragments. Micrometer‐sized intra‐ and inter‐layer pores formed in the shells before the complete decomposition of calcite. The shape, dimension and location of the pores within the shell microstructure were found to be directly related to the firing temperature. The analysis of these microstructural features in archaeometric studies offers a good constraint on the estimation of the firing temperature in shell‐bearing pottery.     

TEXTURAL ANALYSIS OF CERAMIC THIN SECTIONS: EVALUATION OF GRAIN SAMPLING PROCEDURES

‘Textural analysis’ is being increasingly used for the characterisation of pottery fabrics. In this study we have investigated some of the effects on the observed size distribution data of applying a number of different grain selection procedures (principally various point-counting and ribbon-counting procedures). The results indicate that significant differences may arise from the application of the various techniques of grain selection and it is important that appropriate procedures be rigorously applied.     

LEAD GLAZES IN ANTIQUITY—METHODS OF PRODUCTION AND REASONS FOR USE*

Transparent high lead and tin-opacified lead-alkali glazes have been extensively used throughout Europe and the Near East from their first appearance in the Roman era and the tenth- to eleventh-century Islamic world, respectively, up until the present day. Using, to a large extent, information which is widely scattered through a diverse range of literature, the methods employed in the production of these two glaze types are first outlined and their merits are then compared with those of alkali glazes in terms of ease of preparation of the glaze mixture, ease of application of the glaze, ease of firing, cost of production, glaze-body fit and visual appearance. The principal advantages of transparent high lead glazes as compared to alkali glazes are shown to be ease of preparation and application of the glaze suspension, low susceptibility to glaze ‘crazing’ and ‘crawling’ and high, optical brilliance. Factors that influence the choice of tin-opacified lead-alkali glazes include ease of production of tin oxide by melting tin and lead metals together; a reduced risk of reduction of lead oxide to lead metal and consequent blackening of the glaze; and, again, low susceptibility to ‘crazing’ and ‘crawling’. Limits of current knowledge regarding these two glaze types and requirements for future research are outlined.     

THE TECHNOLOGY OF ‘GLAZED’ RESERVED SLIP WARE—A FINE CERAMIC OF THE HARAPPAN PERIOD*

‘Glazed’ Reserved Slip Ware (RSW) is a high‐quality glossy bichrome pottery of the Indus Valley civilization, and dates to the mature Harappan period (c. 2600–1900 bc ). Scanning electron microscopy with energy‐dispersive X‐ray analysis indicates that the surface coat on RSW is composed of a pale grey vitrified clay slip, which overlies a black slip with significantly higher iron oxide. Hence the term ‘sintered’ Reserved Slip Ware is to be preferred. X‐ray diffraction analysis indicates that both the pale and black slips contain hercynite, mullite and quartz, but observation by scanning electron microscopy shows that the black slips contain higher amounts of coarser‐grained hercynite. The elemental data suggest that different clays were used to make the bodies and the slips. However, key element ratios are very close in associated black and pale slips. The grey slip may have been produced by elutriation of the fine, iron oxide‐rich clay that was used to prepare the black slip. The pale grey slip was laid over the black and removed by combing to produce a bichrome effect, which evoked semi‐precious materials such as agate. RSW was a specialist product that required significantly higher input skill and resources than the majority of Harappan clay‐based ceramics. It is a further example of the range of sophisticated Harappan ceramic wares, which included faience, fired steatite and stoneware.     

Managing Neoliberal Urban Spaces: Commercial Property Development at Australian Airports

Airports are remaking Australian cities as they remake themselves as privatised enclaves of commercial entrepreneurialism. In line with overseas trends towards airport cities, all major federally leased Australian airports now derive a significant proportion of their revenue from non‐aeronautical property development. New land uses such as direct factory outlets, big‐box retailing, and even brickworks have proven most controversial. State governments, local councils, community groups, industry, and professional associations have expressed concerns about these commercial developments with statutory responsibility for development approvals vested solely in the federal government. The paper draws on the concept of ‘actually existing neoliberalism’ to interpret the making of the new market‐driven airport spaces, the controversies which have ensued, and the re‐regulatory interventions of the Commonwealth required to address community tensions. The debate about development of non‐aeronautical activities on federally leased airport land is explored through the lens of the National Aviation Policy Review. The recommendations of this Review aim to incrementally reconfigure the policy commitment to ‘light handed’ regulation but future planning conflicts seem inevitable.     

THE EFFECTS OF CORROSION AND CONSERVATION TREATMENTS ON NON‐DESTRUCTIVE NEUTRON DIFFRACTION ANALYSIS OF ARCHAEOLOGICAL COPPER ALLOYS: PRELIMINARY RESULTS*

Analysis of residual stress in archaeological copper alloy artefacts by neutron diffraction has considerable potential for the investigation of early fabrication processes. However, residual stresses in metals are known to relax due to conditions similar to those encountered during burial, corrosion and conservation. In this pilot study, we investigate the effects of corrosion and conservation on a small group of replica copper ingots. Although corrosion and light cleaning do indeed cause some relaxation of stresses in the metal, corrosion having the most significant effect, the basic patterns and major features of the stress profiles may still be seen.