Impact of charring on cereal grain characteristics: linking prehistoric manuring practice to δN signatures in archaeobotanical material

Systematic use of animal manure has been demonstrated to be detectable in the plant δ¹⁵N value but evidence of manure affecting isotopic composition is mainly based on studies of fresh plant material. These findings can potentially be applied to archaeobotanical assemblages and thus provide information about prehistoric manuring practice. Prehistoric grains are generally found in a charred state of which the exact charring conditions are unknown but most likely often multifarious. In this study we examined the influence of grain weight and a range of charring conditions with regards duration, temperature, oxygen availability, and manuring. The charring was applied to emmer, spelt and naked barley with assessment of weight loss, N concentration and δ¹⁵N. There were only small and non-systematic variations in δ¹⁵N in relation to grain weight class. We also found that charring did not distort δ¹⁵N in either a systematic or substantial way and conclude that manuring most likely will be detectable in archaeobotanical charred grains. As certain within-grain variability in δ¹⁵N existed, especially in the intensively manured grains, the resolution of this kind of information should be carefully considered. However, despite attempts to deliberately tamper and distort the grain δ¹⁵N signature, the changes observed in this study were too small to be of any consequences for the archaeobotanical applicability of the method. Thus the isotope method offers unique evidence about prehistoric manuring practice.     

In situ Preservation Solutions for Deposited Iron Age Human Bones in Alken Enge,Denmark

The rich mass deposition of Iron Age human bone material from the Danish site, Alken Enge, is extraordinary not only from an archaeological perspective but also from a preservation point of view. The main find is situated in a waterlogged, anoxic environment which provides excellent preservation conditions and therefore enables in situ preservation of the human bones. However, major differences in local environmental conditions challenge an in situ preservation of the entire site area as parts of the bone material presently deteriorate. In this paper, a multi-proxy environmental monitoring approach is used to document threats and to suggest the best preservation solution for the archaeological finds, whether in or ex situ.     

Periostitis and osteolysis in a medieval skeleton from South‐West Hungary: (Leprosy,treponematosis, tuberculosis or hypertrophic osteoarthropathy) A diagnostic challenge!

This paper uses macroscopic and radiological examinations to provide differential diagnoses of pathological lesions in the well‐preserved skeleton of a young male from the medieval site of Zalavár in South‐West Hungary. Macroscopic inspection of the skeleton revealed conspicuous thickening of the tibiae and fibulae with ‘tree bark’ appearance of the cortex. Periosteal proliferations are also found on the calcanea and on the posterior part of the femora. The metatarsals showed bony proliferation and bone dissolution. No alteration of the axial skeleton or the skull was noted. Radiographs showed thickening of the cortex of tubular bones due to a multilayered type of periosteal apposition. The likelihood of these symptoms being the result of melorheostosis, hypervitaminosis A, fluorosis, thyroid acropachy, endosteal hyperostosis, tuberculosis (TB), hypertrophic osteoarthropathy (HOA), treponematosis and leprosy is reviewed. None completely explains the entire spectrum of pathological lesions in the current individual, but the individual may have suffered from two co‐existent diseases. As a clinical entity, the changes in the metatarsals are compatible with leprosy, whereas the periosteal proliferations of the lower limbs point to a diagnosis of HOA as a secondary syndrome. Thus, a combination of leprosy and TB is suggested as a potential diagnosis. Although not definitive, our differential diagnosis was able to exclude a number of conditions producing periosteal apposition. Copyright © 2011 John Wiley & Sons, Ltd.     

THE INFLUENCE OF ECONOMIC DIVERSITY ON UNEMPLOYMENT AND STABILITY*

ABSTRACT. For many years, regional scientists, economists, and geographers have been unable to clarify the influence of economic diversity on unemployment and instability in regional economies of the United States, the United Kingdom, and Canada. This article presents plausible theory, proper units of analysis, valid measures, and more inclusive models of the diversity-stability relationship. The findings are generalizable because the sample includes most metropolitan areas in the U.S. The empirical analysis estimates the influence of diversity, employment concentrated in unstable industries, population size, growth rate, and control variables on unemployment and employment instability during the 1972–88 period. The results indicate that metropolitan areas which are more diverse experience lower unemployment rates and less instability than areas which are less diverse.     

Experimental archaeology and boats

Experimental archaeology has now a definite place in research and the late Paul Johnstone was a pioneer in organizing such experiments especially with boats. In our February issue we published a reconsideration of his experiment, in collaboration with Professor Marstrander, on building a hide boat. We now welcome a discussion by Mr Christensen and Dr Morrison on the recent publication The building and trials of the replica of an ancient boat: the Gokstad faering Part 1. Building the replica by Sean McGrail. 59 pp. 50 figs. Part 2. The sea trials by Eric McKee. 38 pp. 25 figs. National Maritime Museum. Maritime monographs and reports no. 11, 1974. London. Ed .