Bringing together the surviving material and manuscript evidence, this book looks closely at a fascinating medieval sundial in the form of a ship. It considers who made and used the surviving instruments, as well as studying the scholars who wrote about it.

The navicula sundial, because of its rarity and attractive form, has interested curators and historians alike: Derek J. de Solla Price described it as “one of the most ingenious and sophisticated mathematical artefacts of the Middle Ages”. Although apparently a specifically English instrument, there is much debate about when and where it was invented, and about who made and used the five surviving medieval examples. This book brings together for the first time evidence from the surviving instruments, and written sources including four previously unknown texts describing how to make or use the instrument, along with previously unknown copies of the text on which previous studies were based. Medieval and Early Modern Science, 11

A window into cultures of scientific practice drawing on the collection of the Whipple Museum of the History of Science. This title is also available as Open Access on Cambridge Core.

Talbert investigates miniature sundials which can be adjusted for the owner's whereabouts. They incorporate a list of locations and latitudes for ready reference, data that offers insight into Romans' worldviews. To some perhaps, these sundials were primarily symbols of scientific awareness as well as imperial mastery of time and space.

A General History of Horology describes instruments used for the finding and measurement of time from Antiquity to the 21st century. In geographical scope it ranges from East Asia to the Americas. The instruments described are set in their technical and social contexts, and there is also discussion of the literature, the historiography and the collecting of the subject. The book features the use of case studies to represent larger topics that cannot be completely covered in a single book. The international body of authors have endeavoured to offer a fully world-wide survey accessible to students, historians, collectors, and the general reader, based on a firm understanding of the technical basis of the subject. At the same time as the work offers a synthesis of current knowledge of the subject, it also incorporates the results of some fundamamental, new and original research.

From medieval to modern, exploring instrumental attitudes toward physical gadgets, diagrams, concepts, methods, and disciplines Opening up the instrumental condition of the human for critical reflection and renewal, Instrumentality illuminates key moments in the intellectual history of the European Middle Ages. J. Allan Mitchell reveals how, in the predigital past, we can recognize many of the operative technics, analytics, and metaphorics that continue to shape human sense and cognition today. Exploring the diverse modalities of medieval instruments, Mitchell’s case studies encompass techniques as seemingly distinct as time-keeping mechanisms, mathematical diagrams, logical syllogisms, and the literary devices of Geoffrey Chaucer and John Gower. A cultural and intellectual history, Mitchell’s work leads readers from three-dimensional objects (physical mechanisms) to two-dimensional inscriptions (maps and diagrams) and onward to overarching disciplinary norms in the early liberal and mechanical arts. Prying loose the subtle, adaptable, and generative concept of technical objects from limiting contemporary frameworks, he shows how these instruments are indispensable to the past—and the future—of the arts and culture at large.

An insightful account of how medieval people experienced time. Alle Thyng Hath Tyme recreates medieval people’s experience of time as continuous, discontinuous, linear, and cyclical—from creation through judgment and into eternity. Medieval people measured time by natural phenomena such as sunrise and sunset, the motion of the stars, or the progress of the seasons, even as the late-medieval invention of the mechanical clock made time-reckoning more precise. Negotiating these mixed and competing systems, Gillian Adler and Paul Strohm show how medieval people gained a nuanced and expansive sense of time that rewards attention today.