Characterisation of archaeological mortars and plasters from kyme (Turkey)

The present study focuses on the compositional characterisation of Roman, proto-Byzantine and Medieval mortars, sampled in the archaeological site of Kyme (Turkey), an Aeolian city, founded in the middle of the XI century BC by Greek populations. The mortars were studied through elemental (SEM-EDS, XRF), mineralogical (XRPD, De Astis calcimeter) and petrographic (polarised optical microscopy) analysis. The comparison between the samples allowed us to emphasise compositional differences within mortars of the same historical period.In particular, we detected the prevalent use of cocciopesto, which was used as a pozzolanic additive to create hydraulic mortars in the Roman and Byzantine period. The cocciopesto was used to improve the technological properties of an initially slaked lime. Furthermore, compositional similarities allowed us to attribute an unknown sample to the Roman period. Our study also pointed out the fact that the lower quality mortars belonged to the Medieval period. As a matter of fact, the most friable sample belonging to the Middle Ages turned out to be a mixture of clay, lime and volcanic sand.     

Preliminary Assessment on Seismic Vulnerability of Masonry Churches in Central Chile

ABSTRACT

The 2010 Maule Chile earthquake (Mw 8.8) caused extensive structural damage to the built heritage. In particular, the poor seismic performance of a set of unreinforced masonry (URM) churches highlighted the need to implement protective and safety strategies in order to preserve these buildings which exhibit unique constructive and typological features, as a result of a combination of Chilean and European construction cultures.

The peculiarity of this heritage and the high seismic hazard of Chilean territory have motivated the present study which aims to apply systematic procedures to assess the seismic vulnerability of these buildings. This article is of archival nature and presents a complete database generated from the geometrical, constructive, and structural characteristics of a representative stock of 106 churches located in central Chile, with the goal of proposing fragility curves to be used in seismic risk assessment. Considering variables related with geometrical, architectonic, and stylistic features, as well as damage levels for the 2010 Maule earthquake, this church sample is classified into three homogenous groups: colonial, neo-classic, and neo-gothic. Moreover, a preliminary qualitative assessment of the seismic capacity of these structures is provided using a survey and analysis of geometric indices for each of the three selected groups.     

Uses of Gypsum in Spanish architectural heritage: Typologies and some unique construction techniques

ABSTRACT

In Spain, gypsum and its many typologies play an important role as a construction material in Spanish architectural heritage. Its historical use is mainly a direct consequence of the abundance of gypsum deposits and a constructive tradition which began in ancient times. In addition to being a sign of constructive identity, gypsum is a clear example of the strong link between traditional architecture and the natural resources of the territory. The aim of this article is after to identify gypsum deposits and gypsum architectural heritage found in different parts of Spain and to explain the different gypsum typologies—other than powdered gypsum—used. Finally, the most unique construction techniques are described, differentiating between structural elements, partitions, and enclosures, as well as architectural elements and surface finishes.     

Quantifying scarcity: deforestation in the Upper Volga region and early debates over climate change in nineteenth-century Russia

ABSTRACT

The paper examines the early history of environmental concerns in Russia. It focuses on a case study: the debates about a potentially detrimental impact of deforestation on water regimes, which took place in the 1830s–40s. It examines two sets of issues: the role of ideas about a growing scarcity of forest resources in Europe; and the actual state of forests in Russia that provided some evidentiary basis for these debates. It argues that these debates were possible at the convergence of several trends: an expanding role and objectives of the forest administration well-versed in European scientific debates of the age and at the same time a visible danger of deforestation in some regions of a strategic significance to the empire. The author also considers different expert cultures and evidentiary standards that could be observed during the debates.     

The Pen and the Plough: Balanta Young Men in Guinea‐Bissau

Up until the late 1990s, the Balanta of Guinea‐Bissau constituted what could be described as a ‘deep rural society’, whose central identity was linked with rice production and cattle accumulation. At the same time, it could be argued that even in the early days after Independence in 1974, the social aspirations of Balanta young men matched those of other Guinean youths in their shared desire to get away from the strictures of gerontocracy and of rural life. Surprisingly, however, this study documents the agency of many rural Balanta young men in changing oppressive social rules, and in using agriculture as a means to fund their education, to feed their families and as a route to prosperity. The authors conclude that the persistent political instability in the country (most acutely felt in the capital city) and the national and global economic crises, together with the Balanta agricultural ethos and the softening of gerontocratic power, are at the root of this revaluing of rural livelihoods. This article challenges current dominant narratives about the crisis of young men in contemporary Africa and highlights the need to study the aspirations and achievements of youth in their rural–urban nexus from a historical and holistic perspective.     

Book reviews

THE UNITED STATES IN WORLD HISTORY. By John B. Rae and Thomas H. D. Mahoney. xv+831 pages. (McGraw Hill Book Co., Inc., New‐York, 1949).

INTERNATIONAL RELATIONSHIPS IN THE AGE OF CONFLICT BETWEEN DEMOCRACY AND DICTAORSHP. By R. Strausz‐Hupé and Stefan T. Possony. xiv+947 pages. (McGraw‐Hill Book Co., Inc., New York, 1950.)

ISLAMIC SOCIETY AND THE WEST, by H. A. R. Gibb and Harold Bowen. Vol. I. Islamic Society in the Eighteenth Century, Part I. Oxford University Press. Published under the auspices of the Royal Institute of International Affairs, pp. xi—313—53 (Appendices)—20 (Indices).

AMERICAN‐RUSSIAN RELATIONS IN THE FAR EAST. By Pauline Tompkins. (Macmillan, New York, 1949. pp. XIV, 426. Maps and bibliography. $5.00).

THE LEFT WING IN SOUTHEAST ASIA. By Virginia Thompson & Richard Adloff (I.P.R.) (William Sloane Associates, New York. $4.00. pp. 298, map, illustrations).

MANCHURIA SINCE 1931. By F. C. Jones. (Oxford University Press, 1949).