In 1687, after he graduated in Medicine, young Antonio Vallisneri (1661-1730) returned in the Duchy of Modena and Reggio. In those years he mainly served as general practitioner; nevertheless, he also devoted many studies to various aspects of the natural sciences. He performed many observations, accurately reporting them in seven Quaderni, which were compiled between 1694 and 1701. Though the Earth sciences occupy only a small part of these diaries, the accuracy of the notes makes them a precious token of the scientific praxis adopted by the author in this field of study. This paper deals with the analysis of these early geological reports, pointing out the main criteria of Vallisneri's experimental method and paying attention to the great significance which these documents had in the elaboration of some of his published works.
The scientific studies of the Italian physician and naturalist Antonio Vallisneri were concerned with the cultural and religious implications of the debate on fossils in the early decades of the eighteenth century. In De' Corpi Marini he summarized the main diluvial theories but declined to support them. He explained the presence of fossils in strata in mountainous regions as the result of localized multiple flood and emersion sequences, and restricted the direct action of God to the biblical Deluge. This theory clearly contradicted the biblical interpretation provided by Catholic orthodoxy, which affirmed the existence of a single global Deluge. Vallisneri therefore had to gloss over its real meaning and use a careful self-censorship system, a strategy that he frequently used in his books. The comparison with the work of several Italian and European authors had great relevance to Vallisneri's theories. He continually exchanged correspondence and natural objects with some of the most outstanding of the eighteenth century natural philosophers. This involvement with other scholars deeply influenced his thought, and helped him to reach a pre-eminent status in the Italian scientific community of the time. From: KÖ LBL-EBERT, M. (ed.) Geology and Religion: A History of Harmony and Hostility.
Since its first attempts to understand natural phenomena, early modern science devoted great attention to the problematic issue of the origin of springs. This essay examines the lively debate that emerged from the studies on fresh water during the years spanning from the mid-sixteenth century to the early eighteenth. By focusing on the interpretations advanced by several authors (including lesser known, but nonetheless important figures such as Mario Bettini, Edward Barlow, and Diacinto Cestoni), and by introducing Antonio Vallisneri's Primi itineris specimen, an unpublished manuscript which reveals significant insights into the hydrogeological debate, a new analysis is provided of the heterogeneous factors which influenced the path of natural philosophy towards the comprehension of the water cycle. The conclusion suggests how a reconsideration of the intricate backgrounds underlying many scientific debates and concepts could play a critical role in solving a still controversial issue: science's need for a history of science.
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