This volume,  The Brazilian Studies in the Philosophy and History of Science,  is the first attempt  to present to a general audience,  works from Brazil on this subject. The included papers are original, covering  a remarkable number of relevant topics of philosophy of science, logic and on the history of science. The Brazilian community has increased in the last years in quantity and in quality of the works, most of them being published in respectable international journals on the subject.  The chapters of this volume are forwarded by a general introduction, which aims to sketch not only the contents of the chapters, but it is conceived as a historical and conceptual guide to  the development of the field in Brazil.   The introduction intends to be useful to the reader, and not only to the specialist,  helping them to evaluate the increase in production of this country within the international context.