A Detailed Geographical Field Study of Solonets Complexes in the Dry Steppe Zone

The microgeographic field study described in this paper was designed to investigate the evolution of solonets soil-and-plant associations in the dry steppe of northern Kazakhstan. The detailed sequence of soil-and-plant associations is described and mapped, and the burrowing activity of rodents is described as a significant factor in the evolution of solonets complexes.     

High latitude,late Campanian (Cretaceous) Radiolaria from offshore south-eastern Tasmania

A well-preserved, low diversity (ten species), high latitude (palaeolatitude 70°S) radiolarian fauna is recorded from shallow-water late Campanian (Late Cretaceious) sediments recovered in cores taken from the continental slope of southeastern Tasmania. These are the first Radiolaria described from Cretaceous rocks of southeastern Australia. Most forms are previously described species but a new species of Petasiforma is described. Age control is provided by dinoflagellates but the radiolarian fauna is similar to late Campanian-Maastrichtian faunas described from Campbell Plateau. A late Campanian age can also be determined from the Radiolaria, which are correlated with the Patulibracchium dickinsoni Zone. The site has subsided some 3200 m since deposition, at an average rate of about 40–45 m/Ma, consistent with other indicators in the region. Radiolaria are similar to other coeval plankton in exhibiting high latitude characteristics.     

MEDITERRANEAN CORAL: ITS USE and EXCHANGE IN and AROUND the ALPINE REGION DURING the LATER NEOLITHIC and COPPER AGE

Different types of Mediterranean coral are described, and the potential sources of prehistoric coral in the central Mediterranean are considered. Early examples of coral artefacts from in and around the alpine region, as well as their finds-contexts, are then described and chronologically defined, and their value, use, and exchange is discussed.     

Early Permian Jakutoproductus (Productida: Brachiopoda) from Patagonia,Argentina

The productid brachiopod genus Jakutoproductus, dominant in the Early Permian marine faunas of northeastern Siberia, is described for the first time from the southern hemisphere. Jakutoproductus australis sp. nov. is described from the Rio Genoa Formation, Chubut Province (Patagonia), Argentina. The age of the Patagonian species is considered to be Sakmarian (Early Permian), possibly Sterlitamakian.     

Secondary cancer in an Anglo-Saxon female

A mature/elderly female skeleton from the Anglo-Saxon cemetery at Eccles, Kent, is described. A diagnosis of Paget's disease of the left tibia is made. The macroscopic radiological features of perforating and non-perforating osteolytic lesions in the cranium and femora are described. The differential diagnosis is discussed. The lesions are considered to be due to metastatic carcinoma, possibly from a primary carcinoma of the breast. There is a brief resumé of other recorded examples of metastatic carcinoma in early skeletons.     

THE DESIGN OF EVALUATION OF ASSAYS OF TRACE ELEMENTS IN A FOSSIL BONE*

The flame atomic absorption spectroscopy method of analysis of trace elements (Mn, Sr, and Cu) in a mammoth's bone and the method of estimation of the data using regression analysis are described. The concentration fields of the single elements in a cross-section through the bone are well described by a fourth degree polynomial. The minimum values and their coordinates have been determined. A method of determination of the original concentrations of trace elements in fossil bones is described further. The approximating features of the regression exponential equations and of the diffusion functions of various shapes were determined and a method for calculating the concentrations and diffusion properties of the bones once deposited in the soil is suggested. The original trace element concentration can be estimated by extrapolation of a suitable exponential or diffusion function.     

Learning to sail the Duyfken replica

The rig of the Duyfken 'replica', a reconstruction Dutch jacht of c . 1600 is described. Sail-handling techniques and sailing performance including steering with a whipstaff are also described. Experiments to improve sailing efficiency, some prompted by analysis of contemporary iconography, are discussed.     

Late Ordovician linguliformean microbrachiopods from north-central Kazakhstan

An assemblage of well-preserved Devonian trilobites is described from limestones in Satun Province, southern Thailand. The biogeographic implications are briefly discussed. The fauna, which is of Early Devonian age, probably Emsian, includes Decoroproetus, Cornuproetus, Platyscutellum and two species of Reedops, one of which is new. No similar fauna has been described before from the Shan-Thai block. The fauna is a typical Hercynian assemblage with close specific comparisons with Turkey, Morocco and Bohemia.     

A new species of triplinerved Laurophyllum from the Eocene of Nerriga,New South Wales

A new fossil triplinerved dicotyledon leaf, Laurophyllum acrocryptocaryoides Conran & Christophel (Lauraceae) from Eocene deposits at Nerriga is described. The fossil is similar to the previously described L. acrodromum Hill, also from this site, but differs in leaf shape and cuticular features. L. acrocrytocaryoides also resembles some members of the extant genus Cryptocarya and its relationship to extant taxa is discussed.     

A Clay Fireback at Hitchin,Hertforshire

Abstract

Two discoveries of pottery kilns at Brill, Buckinghamshire, during construction work in 1974 and 1975 are described. One, a fairly complete kiln, is dated to the early seventeenth century and two others to the latter half of that century. The last working Brill kiln of 19th-century date was also re-discovered. The longevity of the industry is briefly discussed and the products of the post-medieval phase described.     

A second species of the possum Durudawiri (Marsupialia: Miralinidae) from the early Miocene of Riversleigh,northwestern Queensland

Durudawiri anfractus sp. nov. (Marsupialia: Miralinidae) is described from Riversleigh. This, the second described species of the genus, is very similar in morphology to, but much larger than, D. inusitatus. Durudawiri anfractus and D. inusitatus are found at similar sites, all early Miocene. The Miralinidae remains one of the most time-restricted families of marsupial, being found so far in only the late Oligocene and early Miocene.     

A curious clinker

This paper investigates a substance found in some Anglo-Saxon cremation urns which has previously been described as “hair slag”. The results of a series of visual and physical examinations are described. These show that it is highly siliceous and, therefore, unlikely to be derived from human hair. A number of alternative sources are considered and the mechanisms operating within the pyre are discussed. The most abundant source of silica in the pyre environment is the sandy substrate which may have been combined with material from the pyre during combustion.     

Discovery of Paleocene Prophalangopsidae (Insecta,Orthoptera) in the Jiangtang Basin,Northern Tibet,China

A new genus and species of Prophalangopsidae, Hylophalangopsis chinensis gen. and sp. nov., is described here on the basis of one well-preserved complete fore wing from the Paleocene of Northern Tibet. The differences between this species and other described species, its systematic position, and its evolutionary significance are discussed.     

Characterization of faunal assemblages and the minimum number of individuals determined from paired elements: Continuing problem in archaeology

A number of problems associated with the calculation and use of indices for the minimum number of individuals are discussed. Special attention is directed to two of the methods currently in use based on the counting of paired skeletal elements. These methods are described, their ranges of variation determined, and the results of application of each to the same hypothetical faunal sample are described and compared. It is urged that caution be exercised in the application of any of these methods and that the imposition of standardized methods be delayed until a more adequate understanding of the behaviour of even the currently existing measures is available.     

Stromatolites from Adelaidean (Late Proterozoic) sequences in central and South Australia

New forms of late Precambrian stromatolites are described from the Amadeus and Georgian Basins and additional information is given on Minjaria pontifera Walter from the Bitter Springs Formation. Tesca stewartii gr. et f. nov. is described from the Boord Formation, Elleria minuta gr. et f. nov. from the Pioneer Sandstone, and Tungussia julia f. nov. from the Julie Formation. The latter is compared with Tungussia cf. T. julia from the Wonoka Formation, South Australia. Acaciella australica Walter has been recognised in the Yackah Beds of the Georgina Basin, supporting a correlation with the Bitter Springs Formation. The stromatolites described were selected because of their potential regional and global stratigraphic significance.     

Gold,its Alloys and their Uses in Dentistry

Abstract

The historical and contemporary role of gold as a restorative material in dentistry is reviewed. The fabrication of fixed restorations by precision casting is described. The various applications and the resulting medical and technical requirements are discussed. Different gold alloy types are presented and described with reference to their composition, mechanical and physical properties, corrosion resistance and biocompatibility. Techniques new to dentistry such as powder metallurgy, electroforming and the use of pure gold direct filling are also discussed.     

Saxton Manuscript Maps and Surveys Not Described by Evans and Lawrence

ABSTRACT

Four surveys by Christopher Saxton and three by Robert Saxton neither listed nor described by Ifor Evans and Heather Lawrence in their book Christopher Saxton, Elizabethan Map-maker, published in 1979, are here presented. Reference is made to another six surveys by Christopher that were not listed by Evans and Lawrence but have been described elsewhere. In view of the rate of discovery, it is concluded that further surveys may yet come to light. Changes in the location of some Saxton materials since the publication of Evans and Lawrence's book are noted in the Appendix.     

Dynamic Central Place Theory: Results of a Simulation Approach

A dynamic central place theory is formulated as a simulation model in which retail activities, described by cost equations, and consumers, described by spatial interaction equations, interact to generate a central place system. The behavior of the model is then examined. Simulation results show that the basic character of the system—whether it is agglomerated or dispersed—depends primarily on a single parameter in the interaction equation, and only secondarily on the specification of the cost function. The results are highly robust in that they are largely independent of the initial sizes and locations of centers, and even independent of the type of interaction equation used. The patterns generated appear plausible.     

GREATER MANCHESTER'S PAST REVEALED

Abstract

A survey of the eighteenth-century quay and nineteenth-century copper mine and arsenic works at Gawton was carried out in 1988 by the Exeter Museums Archaeological Field Unit. Although ruined, many structures remain from each of the four main uses made of the site, and these are described and discussed below. A study was also made of the available documentary material, and this is integrated with the physical evidence and the history and development of the site discussed. The process of arsenic manufacture is briefly described with reference to the surviving buildings.