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UCL Department of Science and Technology Studies is an interdisciplinary centre for the integrated study of science's history, philosophy, sociology, communication and policy, located in the heart of London. Founded in 1921. Award winning for teaching and research, plus for our public engagement programme. Rated as outstanding by students at every level.
At UCL, the academic mission is paramount. Our ambition is to achieve the highest standards in our teaching and research.
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Irena Maria McCabe
PhD completed 2012
Second best as a researcher, second to none as a populariser? The atmospheric science of John Tyndall FRS (1820-1893)
John Tyndall, FRS (1820-1893), the eminent scientist and mountaineer, the discoverer of the greenhouse gases, has been frequently presented as chiefly a populariser of science rather than a researcher. Although he regarded this education as an important function to fulfil, his researches and discoveries reported in the publications of the Royal Society, the Royal Institution and the British Association for the Advancement of Science, constitute a testimony to his standing as a scientist, hitherto neglected by his commentators. This thesis studies his contributions to the physics of the atmosphere and their subsequent impact on meteorology, research that is relevant to today’s concerns about climate change. Tyndall, did however, also make discoveries in other branches of physics, chemistry and bacteriology.
Like many aspiring British scientists of the nineteenth century, Tyndall went to Germany as a mature student. He chose the University of Marburg to study chemistry, physics and mathematics under the renowned chemist, Robert Bunsen, the physicist Gerling and the mathematician Stegmann respectively, graduating with a PhD in applied mathematics.
At this time Faraday’s extraordinary discovery of diamagnetism in 1846 were causing a sensation in Germany, France and Britain. Scientists eagerly studied Faraday’s research, replicating his experiments and interpreting his findings. Faraday’s work apparently confirmed concomitant researches by Plücker on the magnetic properties of crystals. Tyndall’s pioneering contributions to the study of diamagnetism constituted his formative experiences as an experimentalist. He effectively challenged the opinions of the distinguished scientists, Faraday and Plücker. The deportment of magnetism with respect to matter provided Tyndall with a comprehensive alternative to Faraday’s views on the interaction of point forces with matter. Tyndall’s analogous investigation of radiant heat and its transmission by the atmosphere enabled him to study matter in its gaseous phase, hitherto inaccessible to the experimental process, and to participate in the all-important shaping of meteorology as a scientific discipline. The analogous interactions of matter with the forces of light and heat prompted Tyndall’s speculations on the role of the molecular structure in the modification and transmission of forces. The Tyndall Centre for the Study of Climate Change, thus named in his honour in the year 2000 by the Director of the Royal Institution, Professor Peter Day, testifies to the importance of Tyndall’s contributions to the all pervading problems which today face mankind.
This thesis also addresses his role as a leading publicist for scientific naturalism and campaigner for science education, throwing a new light on his motives. On the death of his mentor and friend, Faraday, Tyndall succeeded him as Resident Professor in charge of the Royal Institution. In this historic laboratory Tyndall devised and perfected experimental methodology for the study of matter in its gaseous phase, thought, until then to not be amenable to scientific investigation. The importance of this contribution to science, underestimated over the years, is highlighted in the thesis. The thesis also looks at his pioneering researches on gases through their interaction with radiant heat and light. It examines how he used the forces of nature as tools to probe the nature of matter. It presents one consequence of Tyndall’s work that led to the discovery of calorescence, from a new perspective.
The author of over 100 scientific papers, Tyndall is revealed as an inspiring research scientist, honoured by the Royal Society and numerous foreign academies. He was however castigated for an inadequate knowledge of mathematics, because he concentrated on imaginative physical interpretations of theoretical notions. At times, therefore, he was seriously underestimated as a scientist, despite admiration by some for the excellence of his work. This theme is also analysed in the thesis. Emerging from this study is an image of Tyndall’s serious engagement with science, and his role as an eminent practitioner and spokesman, who viewed science as beneficial to mankind, and physics as a means of education.
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