Further Insight into Mesoamerican Paint Technology: Unveiling the Colour Palette of the Pre‐Columbian Codex Fejérváry‐Mayer by Means of Non‐invasive Analysis

Here, we report on the analytical findings and their cultural implications of a multidisciplinary study of the pre‐Columbian Codex Fejérváry‐Mayer. Today conserved at the World Museum in Liverpool, it is one of the finest Mesoamerican codices among the few extant. Thanks to the exploitation of non‐invasive analytical methodologies accessible through the MOLAB European mobile facility, the study allowed us to disclose the chemical composition of the painting materials used in the codex, which have never been analysed before. The results are discussed and compared with the outcomes of previous studies on other Mesoamerican codices.     

Studying Incremental Institutional Change: A Systematic and Critical Meta‐Review of the Literature from 2005 to 2015

Since the early 2000s, theorizing on incremental institutional change has made inroads in comparative historical analysis. In particular, the ideas, concepts, and theory introduced by Kathleen Thelen and her collaborators have been widely adopted by scholars. These scholars are not, however, univocally positive about the theory. Three main critiques have been plaguing the theory since its early days: the concepts it builds on lack clarity, the model of agency it uses is too static, and the theory lacks analytical power overall. Following the Preferred Reporting Items for Systematic Reviews and Meta‐Analysis method, this article presents a meta‐analysis of the peer‐reviewed empirical literature from 2005 to 2015 that applies this theory. It seeks to better understand the reach of the critiques expressed, as this may provide a starting point for improvement. It finds considerable quantitative support for the critiques, and uncovers an additional problematic issue: the tendency for concept stretching and concept proliferation by scholars seeking to overcome the shortcomings of the theory. Paradoxically, concept stretching and proliferation only further reduce the analytical power of the theory. The article concludes with suggestions for improvement of the development and application of the theory.     

Compositional Analysis of 14th–15th Century Enamels from the Altar of San Giovanni in Florence: an Integrated Study by Portable X‐Ray Fluorescence and Electron Probe Microanalysis

The enamels of the Altar of San Giovanni, from the Baptistery of Florence, were investigated using both non‐invasive and micro‐invasive analysis in order to elucidate the glass melting and colouring techniques. A few fragments detached from the altar and recovered by the restorers were analysed in cross‐section by electron probe microanalysis. Moreover, non‐invasive investigations by portable XRF allowed a large number of enamelled plaques to be investigated. The results showed a good agreement between the two techniques and made it possible to identify similarities or differences in the enamels of the three manufacturing periods of the altar.     

The Copper CHARM Set: A New Set of Certified Reference Materials for the Standardization of Quantitative X‐Ray Fluorescence Analysis of Heritage Copper Alloys*

This paper introduces a new set of certified reference materials designed to aid scientists and conservators working in cultural heritage fields with quantitative X‐ray fluorescence analysis of historical and prehistoric copper alloys. This set has been designated as the Copper CHARM Set (Cultural Heritage Alloy Reference Material Set). The Copper CHARM Set is designed to be used by a wide range of museum‐, art‐ and archaeology‐oriented scientists and conservators to help improve the accuracy and range of their calibrations for quantitative ED–XRF spectrometry of copper alloys, and also increase the number of elements that can routinely be quantified. In addition, the common use of a single core set of the reference materials is designed to significantly improve inter‐laboratory reproducibility, allowing greater data sharing between researchers and thus furthering possibilities for collaborative study.     

Biostratigraphic Evidence Relating to the Age‐Old Question of Hannibal's Invasion of Italy,II: Chemical Biomarkers and Microbial Signatures

As discussed in Part I, a large accumulation of mammalian faeces at the mire site in the upper Guil Valley near Mt. Viso, dated to 2168 cal ¹⁴C yr., provides the first evidence of the passage of substantial but indeterminate numbers of mammals within the time frame of the Punic invasion of Italia. Specialized organic biomarkers bound up in a highly convoluted and bioturbated bed constitute an unusual anomaly in a histosol comprised of fibric and hemist horizons that are usually expected to display horizontal bedding. The presence of deoxycholic acid and ethylcoprostanol derived from faecal matter, coupled with high relative numbers of Clostridia 16S rRNA genes, suggests a substantial accumulation of mammalian faeces at the site over 2000 years ago. The results reported here constitute the first chemical and biological evidence of the passage of large numbers of mammals, possibly indicating the route of the Hannibalic army at this time. Combined with the geological analysis reported in Part I, these data provide a background supporting the need for further historical archaeological exploration in this area.