Significant advances have been made recently in both the theoretical understanding and observation of small-scale turbulence in different layers of the Sun, and in the instabilities that give rise to them. The general development of solar physics, however, has led to such a degree of specialization as to hinder interaction between workers in the field. This book therefore presents studies of different layers and regions of the Sun, but from the same aspect, concentrating on the study of small-scale motions. The main emphasis is on the common theoretical roots of these phenomena, but the book also contains an extensive treatment of the observational aspects.

Significant advances have been made recently in both the theoretical understanding and observation of small-scale turbulence in different layers of the Sun, and in the instabilities that give rise to them. The general development of solar physics, however, has led to such a degree of specialization as to hinder interaction between workers in the field. This book therefore presents studies of different layers and regions of the Sun, but from the same aspect, concentrating on the study of small-scale motions. The main emphasis is on the common theoretical roots of these phenomena, but the book also contains an extensive treatment of the observational aspects.

A look at the competing notions of time in the middle ages, from the spiritual - death, the Last Judgement - to the practical - lawyers' calculations, clocks and calendars. By exploring some of the more important senses of time which were in circulation in the medieval world, scholars from a wide range of disciplines trace competing definitions and modes of temporality in the middle ages, explainingtheir influence upon life and culture. The issues explored include anachronism as a feature in earlier senses of time, perceptions of death and of the Last Judgement, time in literary narratives and in music, constructions of timeas used in the professions, and original work on the particular systems and technologies which were used for the keeping of time, such as clocks and calendars. Contributors: PAUL BRAND, PETER BURKE, MARY J. CARRUTHERS, DEBORAH DELIYANNIS, CHRISTOPHER HUMPHREY, ROBERT MARKUS, AD PUTTER, HOWARD WILLIAMS.