Evidence for volcanic ash fall in the Maya Lowlands from a reservoir at Tikal,Guatemala

Powder X-ray diffraction and petrographic analyses of reservoir sediments from Tikal, Guatemala have identified significant quantities of decomposed volcanic ash in the form of smectite and euhedral bipyramidal quartz crystals. X-ray fluorescence trace element content analysis was used to eliminate distant Sahara-Sahel and Antilles sources. The Zr/Y and Ni/Cr ratios of reservoir sediment from Tikal are consistent with a source from Central American volcanism (e.g., Guatemalan and Salvadoran). AMS radiocarbon dating of the smectite and crystalline quartz-rich reservoir sediments show that volcanic ash fell during the Preclassic, Classic, and Postclassic Maya cultural periods. It may now be possible to develop an effective chronology of ash fall at Tikal and the greater Peten.     

Practical and Auspicious: Thai Handbook Knowledge for Agriculture and the Environment

This article is the first thorough examination of the Thai handbooks that are produced to explain agricultural and environmental knowledge. These khu-meu (handbooks) and tamra (textbooks) come into use when knowledge is moving from one party to another. They also establish symbolic correlations within the human, terrestrial world, or between the human, terrestrial world and the worlds of the gods, spirits, ancestors, or the unseen. Despite the fact that handbooks are pervasive for the organising, preserving, retrieving, transmitting and consuming of knowledge throughout the Southeast Asian region, there has been very little concerted study of handbook knowledge. Our analysis of environmental handbooks in Thailand shows that simplified mastery is a common goal of the handbook genre in both its “how to” and “reading signs” forms. The knowledge captured by the Thai language handbooks is of a practical, predictive kind and suited to particular circumstances. Such knowledge can ultimately bridge and blur the dichotomy between scientific and local epistemologies.     

A Geostatistical Linear Regression Model for Small Area Data. 一种适用于小区域数据的地统计线性回归模型

We present a new linear regression model for use with aggregated, small area data that are spatially autocorrelated. Because these data are aggregates of individual‐level data, we choose to model the spatial autocorrelation using a geostatistical model specified at the scale of the individual. The autocovariance of observed small area data is determined via the natural aggregation over the population. Unlike lattice‐based autoregressive approaches, the geostatistical approach is invariant to the scale of data aggregation. We establish that this geostatistical approach also is a valid autoregressive model; thus, we call this approach the geostatistical autoregressive (GAR) model. An asymptotically consistent and efficient maximum likelihood estimator is derived for the GAR model. Finite sample evidence from simulation experiments demonstrates the relative efficiency properties of the GAR model. Furthermore, while aggregation results in less efficient estimates than disaggregated data, the GAR model provides the most efficient estimates from the data that are available. These results suggest that the GAR model should be considered as part of a spatial analyst's toolbox when aggregated, small area data are analyzed. More important, we believe that the GAR model's attention to the individual‐level scale allows for a more flexible and theory‐informed specification than the existing autoregressive approaches based on an area‐level spatial weights matrix. Because many spatial process models, both in geography and in other disciplines, are specified at the individual level, we hope that the GAR covariance specification will provide a vehicle for a better informed and more interdisciplinary use of spatial regression models with area‐aggregated data.     

Events,Social Memories,and Community in a Final Bronze Age Building’s Biography at Sant’Aniceto,Calabria, Italy

Archaeologists investigating Middle Bronze to Early Iron Age periods (1600–900 b.c.) in southern Italy often explore linkages between emerging inequality and foreign trade connections, establishing a coupled trope of “change emerges from external forces” and “waiting for civilization to arrive”. Based on excavations at the Recent/Final Bronze and Early Iron Ages (RFBA/IA, 1200–900 b.c.) site of Sant’Aniceto in Calabria, we offer an alternative narrative in which hierarchy and institutionalized inequality held little sway in this community. By employing a building biography approach, we examine the variety of ways people sustain their communities through the creation and value of difference (e.g., age, knowledge, or skill) that characterize daily life, even when political hierarchy is absent. Our research at Sant’Aniceto centers on understanding the locally-grounded experiences and lives of people by approaching social difference through the lens of the materialities of everyday life.     

Hall of mirrors: Ritualized homosexuality in Melanesia

Herdt, Gilbert H. Ritualized Homosexuality in Melanesia. Berkeley: University of California Press, 1984. xviii + 409 pp. including maps, bibliography, and index. $24.95 cloth.     

Socio-economic Dislocation and Inter-war Emigration to Canada and the United States: A Scottish Snapshot

During the 1920s emigration from Scotland exceeded the natural growth of population. Yet relatively little attention has been paid to the mechanisms of relocation, the regional and occupational origins and destinations of the emigrants or their demographic profile. This article draws on the recently compiled Scottish Emigration Database to provide a quantitative snapshot of the circumstances of 18,512 passengers who embarked on the lower Clyde in the first four months of 1923. The first section explains the rationale, methodology and historiographical context of the database. Then, after outlining the economic, social and political climate in inter-war Scotland, the article investigates the extent to which decay, dislocation and disillusionment – or alternatively opportunity and ambition – provoked transatlantic emigration. Reference is made to local and regional issues within Scotland, notably in the urban-industrial central belt and the crofting communities of the Hebrides. Setting the Scottish experience within the wider framework of British emigration policy between the wars, it also evaluates the effectiveness of empire settlement legislation in recruiting and retaining settlers for Canada against the competing attractions of the United States.