Made available in DSpace on 2016-04-28T14:16:46Z (GMT). No. of bitstreams: 1 Elisa Cristina Oliosi.pdf: 2497503 bytes, checksum: 29e83643e5644b7dce48c0e2c1034f8e (MD5) Previous issue date: 2010-06-14 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / In the present thesis we approach some aspects related to the investigative process of Joseph Priestley (1733-1804) about the theory of electricity the theory of two fluids. Priestley was one of the natural philosophers who made countless experiments in order to observe the existence of electricity in various bodies. Theirs experiments were described in many publications such as The History and Present State of Electricity with Original Experiments and Familiar to the Study of Electricity. It‟s possible to verify in these publications how was the process of the construction of the theory of electricity. We seek, therefore, in this work we intend to analyze the course of Priestley‟s thought pointing specifically to his methodology of study which involved theory and practice. In order to do so, we privilege our analysis on the experiments with inanimate bodies to focus how he explained the theory of the two electric fluids / Nesta tese abordamos alguns aspectos relacionados ao processo investigativo de Joseph Priestley (1733-1804) sobre a teoria da eletricidade, a saber, a teoria dos dois fluidos elétricos. Priestley foi um dos filósofos naturais que realizou inúmeros experimentos a fim de verificar a existência da eletricidade em diversos materiais. Seus experimentos foram descritos em várias obras, destacando-se The History and Present State of Electricity with Original Experiments e Familiar to the Study of Electricity. É possível verificar nestas publicações como foi o processo de construção da teoria da eletricidade. Buscamos, assim, nesta pesquisa analisar o percurso do pensamento de Priestley, apontando para sua metodologia de estudo, que envolvia a teoria e a prática. Para tanto, privilegiamos a análise dos experimentos com corpos inanimados a fim de abordar como ele explicava a teoria dos dois fluidos elétricos