Although the development of ideas about the motion and trajectory of comets has been investigated piecemeal, we lack a comprehensive and detailed survey of ph- ical theories of comets. The available works either illustrate relatively short periods in the history of physical cometology or portray a landscape view without adequate details. The present study is an attempt to review – with more details – the major physical theories of comets in the past two millennia, from Aristotle to Whipple. My research, however, did not begin with antiquity. The basic question from which this project originated was a simple inquiry about the cosmic identity of comets at the dawn of the astronomical revolution: how did natural philosophers and astronomers define the nature and place of a new category of celestial objects – comets – after Brahe’s estimation of cometary distances? It was from this turning point in the history of cometary theories that I expanded my studies in both the pre-modern and modern eras. A study starting merely from Brahe and ending with Newton, without covering classical and medieval thought about comets, would be incomplete and leave the fascinating achievements of post-Newtonian cometology unexplored.

In a lively investigation into the boundaries between popular culture and early-modern science, Sara Schechner presents a case study that challenges the view that rationalism was at odds with popular belief in the development of scientific theories. Schechner Genuth delineates the evolution of people's understanding of comets, showing that until the seventeenth century, all members of society dreaded comets as heaven-sent portents of plague, flood, civil disorder, and other calamities. Although these beliefs became spurned as "vulgar superstitions" by the elite before the end of the century, she shows that they were nonetheless absorbed into the science of Newton and Halley, contributing to their theories in subtle yet profound ways. Schechner weaves together many strands of thought: views of comets as signs and causes of social and physical changes; vigilance toward monsters and prodigies as indicators of God's will; Christian eschatology; scientific interpretations of Scripture; astrological prognostication and political propaganda; and celestial mechanics and astrophysics. This exploration of the interplay between high and low beliefs about nature leads to the conclusion that popular and long-held views of comets as divine signs were not overturned by astronomical discoveries. Indeed, they became part of the foundation on which modern cosmology was built.

Self-styled adventurer, literary wit, philosopher, and statesman of science, Pierre-Louis Moreau de Maupertuis (1698-1759) stood at the center of Enlightenment science and culture. Offering an elegant and accessible portrait of this remarkable man, Mary Terrall uses the story of Maupertuis's life, self-fashioning, and scientific works to explore what it meant to do science and to be a man of science in eighteenth-century Europe. Beginning his scientific career as a mathematician in Paris, Maupertuis entered the public eye with a much-discussed expedition to Lapland, which confirmed Newton's calculation that the earth was flattened at the poles. He also made significant, and often intentionally controversial, contributions to physics, life science, navigation, astronomy, and metaphysics. Called to Berlin by Frederick the Great, Maupertuis moved to Prussia to preside over the Academy of Sciences there. Equally at home in salons, cafés, scientific academies, and royal courts, Maupertuis used his social connections and his printed works to enhance a carefully constructed reputation as both a man of letters and a man of science. His social and institutional affiliations, in turn, affected how Maupertuis formulated his ideas, how he presented them to his contemporaries, and the reactions they provoked. Terrall not only illuminates the life and work of a colorful and important Enlightenment figure, but also uses his story to delve into many wider issues, including the development of scientific institutions, the impact of print culture on science, and the interactions of science and government. Smart and highly readable, Maupertuis will appeal to anyone interested in eighteenth-century science and culture. “Terrall’s work is scholarship in the best sense. Her explanations of arcane 18th-century French physics, mathematics, astronomy, and biology are among the most lucid available in any language.”—Virginia Dawson, American Historical Review Winner of the 2003 Pfizer Award from the History of Science Society

"A review of astronomy" (varies).

A thorough and practical introduction to inductive logic with a focus on arguments and the rules used for making inductive inferences. This textbook offers a thorough and practical introduction to inductive logic. The book covers a range of different types of inferences with an emphasis throughout on representing them as arguments. This allows the reader to see that, although the rules and guidelines for making each type of inference differ, the purpose is always to generate a probable conclusion. After explaining the basic features of an argument and the different standards for evaluating arguments, the book covers inferences that do not require precise probabilities or the probability calculus: the induction by confirmation, inference to the best explanation, and Mill's methods. The second half of the book presents arguments that do require the probability calculus, first explaining the rules of probability, and then the proportional syllogism, inductive generalization, and Bayes' rule. Each chapter ends with practice problems and their solutions. Appendixes offer additional material on deductive logic, odds, expected value, and (very briefly) the foundations of probability. Argument and Inference can be used in critical thinking courses. It provides these courses with a coherent theme while covering the type of reasoning that is most often used in day-to-day life and in the natural, social, and medical sciences. Argument and Inference is also suitable for inductive logic and informal logic courses, as well as philosophy of sciences courses that need an introductory text on scientific and inductive methods.