Patterns of Diagenesis in Bone II: Effects of Acetic Acid Treatment and the Removal of Diagenetic CO3

Archaeological bones of varying preservation have been treated with 0·1 M acetic acid in order to investigate the effect on structural and chemical alterations caused by diagenesis. Acetic acid is commonly used as a “cleaning agent” for removing diagenetic carbonate from bone and enamel, in an attempt to recover original, biogenic signals for use in dietary and¹⁴C dating studies.Diagenetic parameters were measured before and after treatment on a range of archaeological bones with good and bad preservation. Histological preservation defined the behaviour of the correlating parameters, where correlation coefficients between carbonate content and crystallinity, microporosity and macroporosity increased significantly after treatment. For histologically well preserved material, acetic acid is effective at returning carbonate content to around that of modern bone. Where bone is extensively damaged by micro-organisms, “loose” diagenetic material can be removed, but a fraction largely composed of hypermineralized bioapatite remains, which, we believe, cannot be reliably used to obtain accurate biological signals.     

The politics of contemporary ethno‐nationalist conflicts

That the 1990s began and ended with wars in the Balkans, often evoking reference to ‘ancient hatreds’, might suggest little has been learned since the fall of the Wall on how to address the recrudescence of violent ethno‐nationalist conflict – and indeed some fatalism as to whether this can be done at all. Yet the rethinking of notions of national sovereignty, the increasing minority‐rights jurisprudence and the development of anti‐essentialist concepts of identity in recent times have begun to indicate new policy instruments which might better allow such conflicts to be managed in the twenty‐first century. As ever, however, policy lags behind intellectual innovations, and the predominant approach of the international community remains for the moment significantly more conservative in character.     

On Early Thimbles: A Seventh‐Century‐AD Example from Punta Secca,Sicily, in Context

A copper‐alloy thimble was found in 2010 at Punta Secca, Sicily, in a sealed context datable by coins to the first quarter of the seventh century AD. It has generally been thought that thimbles did not reach the Mediterranean area until the ninth century AD, but at least nine metal examples are in fact attested at various places from contexts datable between the late sixth century and the early ninth. It is suggested that the increasing use of silk in clothing in the Byzantine Empire during the seventh century, probably accompanied by the use for the first time of steel needles which made the use of a finger protector imperative, explains the apparent introduction of thimbles at this time. No securely dated metal thimbles are known from sites of Roman date, except for one at Ephesus of c.AD 100. It is very tentatively suggested that this last example might represent an import from China, where thimbles (and steel needles) are attested from at least the third century BC onwards.