Watermills: The Origin of the Use of Renewable Hydraulic Energy in Spain

The use of renewable hydraulic energy sources by mankind most likely has its origins in the development of the watermills. To understand the functioning of these mills, this article first reviews, through the analysis of different bibliographical sources, the technical evolution of the machinery used since the appearance of the first watermills to grind cereal grain in the 1st century bc.

Secondly, a particular area of the south-west of Spain, Alcalá de Guadaíra, has been selected for study, whose strategic location as well as its hydrological characteristics gave rise, firstly, to an intensive milling industry, and, later, a famed baking industry, from the late Middle Ages until recent decades. The huge development of these two industrial activities has made Alcalá de Guadaíra an exceptional example in Spain, with 40 watermills in the early 18th century.

Extensive work on site allowed the analysis of the state and types of watermills that still exist in this area, identifying their similarities and differences. Unfortunately, after they fell into disuse, only 28 of these mills remain today; 12 of them are in a relative good state of preservation, seven in an alarming state of ruin and, of the other nine, only some unrecognisable vestiges remain. Some of these mill buildings have been restored recently, although their machinery is missing. Only from old photographs or by visiting mills restored in other areas is it possible to determine how these watermills worked.

Due to the lack of financial resources to carry out physical restoration of the industrial heritage missing in these flour mills, a virtual model of one of them has been developed. This work provides, at least virtually, a reconstruction of the traditional mills which helps promote technological studies and shows how they worked, as part of virtual exhibitions. In addition, a computer application of augmented reality has been developed that any visitor can install on a mobile device to display the virtual reality of the machinery, generated by 3D models, so they can visualise the physical reality that they would have found in the mill.     

Integrated Analytical Techniques for the Study of Colouring Materials from Two Megalithic Barrows

We have determined the composition of rock art pigments from two megalithic barrows located in the north of Portugal. The use of XRD, SEM–EDS and FT–IR spectroscopy confirmed the presence of hematite and kaolinite in the red pigments from the Eireira barrow, and kaolinite in the white pigment from the Leira das Mamas barrow. The organic composition of the pigments was studied by GC–MS, suggesting that the red sinuous lines and dots from the Eireira barrow were prepared with cooked or heated algae and/or aquatic plants, with egg as binder, while the white pigment from the Leira das Mamas barrow revealed a mixture of vegetable oils for kaolinite moulding, which could be stabilized by temporary exposure to high temperatures. The multi‐analytical approach used on this study of megalithic pigments allowed the recovery of important data about north‐western prehistoric communities, namely the way in which they exploited existing resources and their ability to transform them.     

Portugal’s Declaration During the Negotiation of the 2001 UNESCO Convention on the Protection of the Underwater Cultural Heritage: International Protection and Cooperation versus Possession

Portugal was the second country in Western Europe to ratify the 2001 UNESCO Convention, a pivotal step that occurred on September 21, 2006. In 2000 the Portuguese delegation presented a statement in the UNESCO meeting for the draft Convention, the substance of which emphasises the protection and cooperation principles concerning the underwater cultural heritage rather than the issue of its possession. In 2008, the discovery of a sixteenth century Portuguese shipwreck near Oranjemund, Namibia, confirmed that the referred statement opened a premonitory strategic window for the conciliation of interests of States around such examples of common heritage.     

UNDERSTANDING LOCAL CONTENT DECISIONS: ECONOMIC ANALYSIS AND AN APPLICATION TO THE AUTOMOTIVE INDUSTRY*

ABSTRACT In industrializing regions, foreign investments often generate spillovers through regional backward links. This situation may create a gap between private and social valuations of resources, resulting in a level of local content below what would be optimal for the economy. This situation creates an opportunity for the enactment of domestic content regulations. This paper presents a model to understand how these policies condition the decisions of the economic agents and affect economic welfare. Then, it simulates the model using a case study of the automotive sector. Results suggest that, in certain conditions, this local content regulation can be welfare enhancing.     

MORE THAN ONE MONUMENT AT POZO MORO? NOTES ON IBERIAN ARCHITECTURAL DECORATION

More than fifty years after the discovery of the first remains from Pozo Moro, new research has begun to question the arrangement, until now agreed upon, of the tower-shaped monument. The recent paper by García Cardiel and Olmos (2021) employs iconography to sketch the possibility that the reliefs and sculptures encountered in said necropolis do not belong to a single monument, but two or more. In this paper we delve into this possibility by studying a fragment of architectural moulding from Pozo Moro, which allows us to conclude the possible existence of a pillar-stele datable between 425–300 BC, when the necropolis was at its floruit. To reach this conclusion special attention is paid to Iberian architectural ornaments, a subject seldom yet studied.