Medieval Descriptions and Doctrines of Stroke: Preliminary Analysis of Select Sources. Part I: The Struggle for Terms and Theories - Late Antiquity and Early Middle Ages (300-800)

This first of a series of papers on the history of stroke presents an examination of a number of exemplary Greek and Latin sources, ranging from late antiquity to the dawn of the Middle Ages. We first establish a chronological order of various groups of texts and, whenever possible, ascertain the relationship of one group of writings to another. In the second century A.D., Galen had used the Hippocratic concept of humoral imbalance as a fundamental explanatory mechanism for the interpretation of clinical manifestations of apoplexy. Galen definitely rejected the Aristotelian precept of the primacy of the heart. According to his teaching, stroke resulted from the accumulation of a thick and dense humor in the ventricles of the brain blocking the passage of the animal spirit. Galen's Greek texts became axiomatic for compilers of the Byzantine period (Aetius of Amida, Alexander of Tralles, Paulus of Aegina). But his ideas contrasted starkly with the theories of the Methodical School which exerted – through the Latin writings of Caelius Aurelianus – a certain influence on authors of the Latin West (Cassius Felix, Theodorus Priscianus). References to stroke can also be found in many theological writings of the early Middle Ages.     

Medieval Descriptions and Doctrines of Stroke: Preliminary Analysis of Select Sources. Part III: Multiplying Speculations – The High and Late Middle Ages (1000–1450)

By analyzing a body of texts compiled by various medical authors from the 11th to the 15th century, four basic developments can be noted: (1) From the beginning of the eleventh century the reception, translation and assimilation of Arabian and arabicized ancient texts became the ultimate goal of Western medicine (Constantine the African, Arnald of Villanova, et al.). Concepts of stroke were consequently guided by textual tradition, not by observation. (2) Scholastic speculations about different aspects of apoplexy, especially those concerning its origins, were numerous (Johannes Platearius, Batholomaeus Salernitanus, Pietro d'Abano, Giacomo da Forlì). Although most medieval physicians used the ancient doctrine of the four humors as model and explanation, opinions differed in many ways. (3) Attempts developed to present a simple outline of the etiology, the prognosis, and the treatment of the disease (Gilbertus Anglicus, Bernard of Gordon, John of Gaddesden). (4) Although lacking in originality, many of these writers nevertheless achieved a certain uniformity in presenting main topics, thus setting the standard for later practitioners.     

Wissenschaftswachstum in wichtigen naturwissenschaftlichen Disziplinen vom 17. bis zum 21. Jahrhundert

The Growth of Science within Important Scientific Disciplines from 17th to 21st century. – In this paper the growth of knowledge is investigated for the disciplines of Astrophysics / Astronomy, of Physics and of Chemistry in the last centuries. In this context the main emphasis is devoted to the discussion of the growth of literature. Besides, this is also illustrated by the growth of indicators like for example important books, new discoveries in science, the chemical elements, the known chemical compounds and the number of known inorganic chemical structures. Compared to numerous earlier studies a systematic evaluation of all presently available data sources is carried out. The data are fitted by different mathematical growth models (linear, quadratic, exponential, hyperbolic). These are discussed and compared. As far as the exponential growth model is applied the doubling periods obtained have values between 11 and 32 years for the cumulative total of publications, between 24 and 98 years for that of important books, between 79 and 163 years for that of new discoveries and between 10 and 14 years for that of chemical substances. From an order of magnitude point of view this is in agreement with the results of other authors. It is however also demonstrated that the exponential growth model which is normally used is not necessarily the best to describe the growth of the data. Other models are often better suitable to explain the growth. It is shown that linear growth of the yearly publications describes the data better than exponential growth in certain epochs. In this latter case it is demonstrated that the parameter (linear slope) for the rate of increase has a constant values in certain epochs, but rises in steps from epoch to epoch by a factor of 3 to 40. After the second world war the linear growth model for the yearly publications or the quadratic growth model for the cumulative total of publications respectively delivers the best results. This is therefore used for forecasting the future.     

Integrated geological,petrologic and geochemical approach to establish source material and technology of Late Cypriot Bronze Age Plain White ware ceramics

Late Cypriot Bronze Age Plain White Wheelmade ware samples from several Cypriot excavation sites and the northern Canaanite coast were studied to ascertain their production centres and details of their manufacturing processes and post-depositional alteration. The investigation of the ceramics, using combined geoscientific analytical techniques (XRF, ICP-MS, XRD and EPMA) allowed four groups of pottery to be distinguished based on their common raw-material sources and/or technological analogies. Sediments that were sampled in East Cyprus (eastern Mesaoria Plain) for comparative purposes indicated that most of the investigated ceramics were produced from raw materials available around the ancient settlement of Enkomi. Appraising technological variations and discriminative raw-material characteristics, several pottery producing workshops in ancient Enkomi (Eastern Cypriot coast) have been identified that merchandised their commodities on Cyprus and, in all probability, also overseas.