‘With utmost certainty’: two late medieval pioneers of technical chronology

ABSTRACT

This article focuses on the chronological methods developed and deployed by two little known medieval scholars, Giles of Lessines (active in the 1260s) and Heinrich Selder (1370s), both of whom made noteworthy advances in the use of astronomy to establish dates and intervals between events in ancient history. Based on their reading of Ptolemy's Almagest, both authors emphasised the importance of dated astronomical observations, such as eclipses, arguing that the recorded intervals between these observations were endowed with a unique degree of reliability. Several key examples of how they mobilised Ptolemy's astronomical data to rectify parts of the timeline between the creation of the world and the present will be discussed. These show that the technical arguments contained in Giles’ and Selder's writings reached a level of sophistication and accuracy that has previously only been associated with chronologers of the early modern and later periods.     

Franz Joseph Gall on hemispheric symmetries

ABSTRACT

Franz Joseph Gall believed that the two cerebral hemispheres are anatomically and functionally similar, so much so that one could substitute for the other following unilateral injuries. He presented this belief during the 1790s in his early public lectures in Vienna, when traveling through Europe between 1805 and 1807, and in the two sets of books he published after settling in France. Gall seemed to derive his ideas about laterality independently of French anatomist Marie François Xavier Bichat (1771–1802), who formulated his “law of symmetry” at about the same time. He would, however, later cite Bichat, whose ideas about mental derangement were different from his own and who also attempted to explain handedness, a subject on which Gall remained silent. The concept of cerebral symmetry would be displaced by mounting clinical evidence for the hemispheres being functionally different, but neither Gall nor Bichat would live to witness the advent of the concept of cerebral dominance.     

Mapping the Nation for War: Landscape in Danish Military Cartography 1800–2000

The focus in this article is on the way the post eighteenth-century cartographic turn in military practices developed into a particular military perception of landscape that continues to set the standard of Danish topographical mapping. My argument is that the development of modern topographical maps is the result of a long process of military comprehension and measurement of the terrain in order to conduct field operations. The demand for spatial data for actual or potential military operations had a direct impact on the specifications of maps produced by the military, as landscape representation was adapted to meet operational demands and as lessons learned from war experience were incorporated. In this and other respects, the development of Danish topographical maps in and after the nineteenth century followed the general trend of European military mapping as regards methods and standards.     

Die Gesellschaft Naturforschender Freunde zu Berlin ‐ Bestand und Wandel einer gelehrten Gesellschaft Ein Überblick

The article deals with the foundation and development of the society Gesellschaft Naturforschender Freunde zu Berlin in the 18th and 19th centuries, its position as a privat society for natural history in Berlin, and its relation to Freemasonry. The paper shows the change of meaning of these society, especially after the foundation of the Berlin university in 1810.     

Ludwig Heinrich Bojanus (1776–1827) on Gall’s craniognomic system,zoology, and comparative anatomy

ABSTRACT

Most of what was known about Franz Joseph Gall’s (1758–1828) organology or Schädellehre prior to the 1820s came from secondary sources, including letters from correspondents, promotional materials, brief newspaper articles about his lecture-demonstrations, and editions and translations of some lengthier works of varying quality in German. Physician Ludwig Heinrich Bojanus (1776–1827) practiced in Vienna’s General Hospital in 1797–1798; attended some of Gall’s public lectures; and, in 1801–1802, became one of the first physicians to provide detailed reports on Gall’s emerging organology in French and English, respectively. Although Bojanus considered the human mind to be indivisible and did not entirely agree with Gall’s assumption that the brain consists of a number of independent organs responsible for various faculties, he provided valuable information and thoughtful commentary on Gall’s views. Furthermore, he defended Gall against the charge that his sort of thinking would lead to materialism and cautiously predicted that the new system would be fruitful for developing and stimulating important new research about the brain and mind. Bojanus became a professor of zoology in 1806 and a professor of comparative anatomy in 1814 at Vilnius University, where, among other accomplishments, he established himself as a founder of modern veterinary medicine and a pioneer of pre-Darwinian and pre-Lamarckian evolutionism.