In On Both Sides of the Strait of Gibraltar Julio Samsó shows that astronomical sources, written in al-Andalus, the Maghrib and the Iberian Peninsula, belong to the same tradition and emphasizes the role of al-Andalus and the Iberian Peninsula in the transmission of Islamic astronomy to medieval Europe.

Suppose one were given the task of mapping the general circulation in an unfamiliar ocean. The ocean, like our own, is subdivided into basins and marginal seas interconnected by sea straits. Assuming a limited budget for this undertaking, one would do well to choose the straits as observational starting points. To begin with, the currents flowing from one basin to the next, over possibly wide and time-varying paths, are confined to narrow and stable routes within the straits. Mass, heat and chemical budgets for individual basins can be formulated in terms of the fluxes measured across the straits using a relatively small number of instruments. The confinement of the flow by a strait can also give rise to profound dynamical conse quences including choking or hydraulic control, a process similar to that by which a dam regulates the flow from a reservoir. The funneling geometry can lead to enhanced tidal modulation and increased velocities, giving rise to local instabilities, mixing, internal bores, jumps, and other striking hydraulic and fine scale phenomena. In short, sea straits repre sent choke points which are observationally and dynamically strategic and which contain a full range of fascinating physical processes.

In the mid-nineteenth century, as European navies learned to neutralize piracy, new patterns of circulation and settlement became possible in the western Mediterranean. The Deepest Border tells the story of how a borderland society formed around the Strait of Gibraltar, bringing historical perspective to one of the contemporary world's critical border zones. Drawing on primary and secondary research from Spain, France, Gibraltar, and Morocco—including military intelligence files, public health reports, consular correspondence, and travel diaries—Sasha D. Pack draws out parallels and connections often invisible to national and mono-imperial histories. In conceptualizing the Strait of Gibraltar region as a borderland, Pack reconsiders a number of the region's major tensions and conflicts, including the Rif Rebellion, the Spanish Civil War, the European phase of World War II, the colonization and decolonization of Morocco, and the ongoing controversies over the exclaves of Gibraltar, Ceuta, and Melilla. Integrating these threads into a long history of the region, The Deepest Border speaks to broad questions about how sovereignty operates on the "periphery," how borders are constructed and maintained, and the enduring legacies of imperialism and colonialism.

The present volume of views and documents bearing upon the extent of the marginal sea is divided into two sections: Part I contains excerpts from the publications of representative publicists; Part II is a compilation of official documents. The documents in Part II are printed in chronological order under countries in alphabetical order.--Publisher's description.