Ekphrasis is familiar as a rhetorical tool for inducing enargeia, the vivid sense that a reader or listener is actually in the presence of the objects described. This book focuses on the ekphrastic techniques used in ancient Greek and Roman literature to describe technological artifacts. Since the literary discourse on technology extended beyond technical texts, this book explores 'technical ekphrasis' in a wide range of genres, including history, poetry, and philosophy as well as mechanical, scientific, and mathematical works. Technical authors like Philo of Byzantium, Vitruvius, Hero of Alexandria, and Claudius Ptolemy are put into dialogue with close contemporaries in other genres, like Diodorus Siculus, Cicero, Ovid, and Aelius Theon. The treatment of 'technical ekphrasis' here covers the techniques of description, the interaction of verbal and visual elements, the role of instructions, and the balance between describing the artifact's material qualities and the other bodies of knowledge it evokes.

Pain might be a powerful diagnostic tool, but it is at the same time an intensely private and subjective experience that represents a formidable problem in the communication between physician and patient. Galen addresses (principally in De locis affectis) the problem of constructing a consistent and univocal terminology for different pain sensations, rejecting the system proposed earlier by Archigenes on the grounds that he relies on metaphorical descriptors which indiscriminately incorporate terms belonging to information generated by all the senses, fails to conform to patient testimony, and refers to ambiguous concepts. Galen sets himself the task of developing a system of proper or literal (kyrios) terms for pain sensations, even despite the apparent ineffability of certain sensations and laymen's imprecise self-analysis and description of their suffering. His pain vocabulary, developed through a combination of consensus between patients and physicians' expert descriptions of their own pain, promises to link terminology univocally to sensation, turning patients' testimony about their subjective experience of pain into universally applicable diagnostic guidance.

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Seneca'sNaturales Quaestionesexplains 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.