A discussion of Lloyd’s Tarner Lectures at Trinity College. The importance of Lloyd’s previous scholarship is characterized and these sweeping, erudite lectures are placed in the context of that scholarship. In the broadest terms, the lectures are a call to culturally and historically comparative study of human reasoning. At their heart is a comparative history of scientific theorizing from the ancients through to modern science. Lloyd rejects the positivist picture, and the view of modern and ancient science as discontinuous; he urges scholars to undertake comparative work on the ancient sciences in different traditions. This critical notice evaluates Lloyd’s view and raises several questions for further reflection.

Seneca's Naturales Quaestiones explains the causes and functional mechanisms of natural phenomena, from common sights like rainbows to exotically out-of-reach ones like comets. The vividness with which he brings them all within the reader's grasp is certainly a literary feat as much as a scientific one, but the rhetorical power of his explanations does not cost them their epistemological validity. Analyses drawn from current philosophy of science reveal elements of fictionality omnipresent in scientific models and experiments, suggesting an approach to Seneca's ‘scientific fictions’ not as failed analogies but as a sophisticated expansion of the tradition of analogical scientific explanation.