A chronometric tool for Hawaiian archaeology: the hydration dating of Pu'u Wa'awa'a trachytic glass

The Pu'u Wa'awa'a trachytic glass deposit located on the Big Island of Hawai'i was a source of lithic tools for much of Hawaiian prehistory. Routinely encountered at habitation sites, the glass has the potential to provide absolute dates based upon the degree of surface hydration. Infrared photoacoustic spectroscopy and secondary ion mass spectrometry were used to monitor the diffusion of water in archaeological and experimental samples. Accelerated laboratory hydration experiments show that water diffusion in trachytic glass containing a structural water content of 0.16% ± 0.03% is linear with time. Application of the calibration to trachytic glass artifacts from the Kahalu'u habitation cave have produced chronometric dates in the 17th–18th centuries. These age estimates are in agreement with radiocarbon dates and artifactual data that bracket the site occupation. However, the glass dates do not correlate well with site stratigraphy and this suggests that slight sample imperfections that retain water may be one factor that results in ages that are too early for later occupation levels.     

Silver lining: evidence for Inka silver refining in northern Chile

Prehistoric silver purification using lead cupellation has been documented in multiple places throughout the Andes, but direct evidence of the Inka use of this technology has remained elusive. In this study, we use X-ray fluorescence, scanning electron microscopy, and electron-microprobe analysis to document direct evidence of Inka period (AD 1400–1532) silver purification using lead cupellation in the Tarapacá Valley of northern Chile. Local metalworkers used wind-driven huayra furnaces to produce pure lead metal, sustaining temperatures of ca. 900–1100 °C to smelt lead-bearing ores that may have included galena. The lead metal was then used in open-vessel cupellation of silver-bearing ores, some of which may have been cupriferous and derived from the nearby Inka mines at Huantajaya. Phase analyses of the slagged interiors of bowl-shaped ceramic vessels used for cupellation indicate that the metalworkers maintained the oxidizing environment and temperatures between 800 and 1100 °C requisite for cupellation. We argue that the Inka introduced this technique to Tarapacá metalworkers. The absence of finished silver artifacts in local valley contexts suggests that the refined silver was removed from the valley for use elsewhere in the empire.     

Paleoindian technological provisioning strategies in the northwestern Great Basin

Great Basin populations during the Pleistocene–Holocene Transition (PHT) are often characterized as being mobile and focused on wetlands; however, the factors that influenced where Paleoindians selected residential campsites are poorly understood. Using predictions derived from optimal foraging-based patch choice models and GIS reconstructions of the PHT landscape, some researchers have argued that occupations in smaller wetlands should have been shorter than occupations in larger wetlands but such arguments have rarely been evaluated using empirical data. The PHT lithic record provides an opportunity to evaluate the relationship between wetland size and occupation span by applying Kuhn's (1995) concept of technological provisioning. Kuhn expects more mobile populations to provision individuals and more sedentary populations to provision places and suggests that: (1) a strategy of provisioning individuals should be reflected by a high proportion of more extensively used artifacts made on non-local raw materials; and (2) a strategy of provisioning places should be reflected by a high proportion of less extensively used artifacts made on local raw materials. We apply the technological provisioning concept to lithic assemblages from two of the Parman localities, extensive PHT sites in the northwestern Great Basin, and compare local and nonlocal artifacts to determine if Paleoindians shifted from provisioning individuals while moving to/from the sites to provisioning the place while occupying them. There is no relationship between artifact transport distance and artifact use intensity. We interpret these findings as evidence that Paleoindians did not alter their provisioning strategies while occupying the Parman localities, likely because occupations were brief within a small wetland poorly-suited to support groups for long periods.     

Character, ‘Ordered Liberty’, and the Mission to Civilise: British Moral Justification of Empire, 1870–1914

In a path-breaking study of the thought of Sir Henry Maine, Karuna Mantena has recently argued that the overthrow, in the second half of the nineteenth century, of the liberal imperialism promoted by Macaulay and James Mill meant that the ‘civilising mission’ became a mere alibi for continued British rule in the empire and that it was drained of all moral content. The article demonstrates, using a wide range of contemporary sources, that, although many British imperialists thought that Asian and African civilisations might never progress to the point of enjoying constitutional government, they did believe that it was the purpose of British rule to bring to their colonial subjects the benefits of what they called ‘ordered liberty’. This they saw as the foundation of Britain's own greatness and as essentially a moral force. Nonetheless, the article goes on to show that one purpose of the civilising mission was to strengthen empire sentiment at home, and thus to underwrite the moral authority of the gentlemanly elites who ran it. The latter feared that the advent of democracy in Britain might otherwise undermine ordered liberty at home and weaken the commitment to the imperial cause.