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.

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.

This volume of 12 studies, mainly published during the past 15 years, begins with an overview of the Islamic astronomy covering not only sophisticated mathematical astronomy and instrumentation but also simple folk astronomy, and the ways in which astronomy was used in the service of religion. It continues with discussions of the importance of Islamic instruments and scientific manuscript illustrations. Three studies deal with the regional schools that developed in Islamic astronomy, in this case, Egypt and the Maghrib. Another focuses on a curious astrological table for calculating the length of life of any individual. The notion of the world centred on the sacred Kaaba in Mecca inspired both astronomers and proponents of folk astronomy to propose methods for finding the qibla, or sacred direction towards the Kaaba; their activities are surveyed here. The interaction between the mathematical and folk traditions in astronomy is then illustrated by an 11th-century text on the qibla in Transoxania. The last three studies deal with an account of the geodetic measurements sponsored by the Caliph al-Ma'mûn in the 9th century; a world-map in the tradition of the 11th-century polymath al-Bîrûnî, alas corrupted by careless copying; and a table of geographical coordinates from 15th-century Egypt.