and by the Librarians and Staffs ofthe University and the Public Libraries at Southampton. Finally, we wish to thank Mrs H. G. Jerrard and Miss A. J. Tutte for typing the manuscript. Department of Physics H. G. JERRARD University of Southampton D. B. McNEILL 1963 Preface to the fifth edition Since the publication of the fourth edition in 1980 advances in technology have led to more precise values of the fundamental physical constants and a movement towards definitions of the fundamental units of mass, length and time based on atomic parameters. More precise definitions of some other units such as the candela have been approved by the international committees. These changes, together with the definitions of several new units have been included in this edition, the text of which has been revised and which now contains over 850 units and dimensionless numbers. The authors wish to thank all those who have helped in this latest compilation by suggestion and kindly criticism and Margaret Wainwright who has had the difficult and tedious task of typing, retyping and copying the fragmented parts that arise from a text revision. At the time of going to press we believe this book to provide the most complete and up-to-date information of its kind available.

units have been included. References, which now number approximately 650, have been brought up to date. The most recently accepted values of the physical constants have been provided. Our thanks go to all those who, since the fifth edition, have helped in this revision by suggestions. In particular the authors express their gratitude to Jane M. Jerrard who, with enthusiasm, put the text into a computer and eliminated the editorial scissors and paste and simplified the onerous and long task of producing a text from the fragmented material of the revision. In the preface to the fifth edition it was suggested that the book provided at that time the most complete and up-to-date information of its kind available. The authors again make the same claim for this sixth edition. H. G. JERRARD D. B. McNEILL Warsash Newtownards Southampton Northern Ireland England Preface to the first edition The intense specialization that occurs in science today has meant that scientists working in one field are often not familiar with the nomenclature used by their colleagues in other fields. This is particularly so in physics. This dictionary is designed to help overcome this difficulty by giving information about the units, dimensionless numbers and scales which have been used, or are still being used, throughout the world. Some four hundred entries are provided and these are supplemented by about five hundred references. The definition of each entry is given together with relevant historical facts.

and by the Librarians and Staffs of the University and the Public Libraries at Southampton. Finally, we wish to thank Mrs H. G. Jerrard and Miss A. J. Tutte for typing the manuscript. Department of Physics H. G. JERRARD D. B. McNEILL University of Southampton 1963 Preface to the fifth ed ition Since the publication of the fourth edition in 1980 advances in technology have led to more precise values of the fundamental physical constants and a movement towards definitions of the fundamental units of mass, length and time based on atomic parameters. More precise definitions of some other units such as the candela have been approved by the international committees. These changes, together with the definitions of several new units have been included in this edition, the text of which has been revised and which now contains over 850 units and dimensionless numbers. The authors wish to thank all those who have helped in this latest compilation by suggestion and kindly criticism and Margaret Wainwright who has had the difficult and tedious task oftyping, retyping and copying the fragmented parts that arise from a text revision. At the time of going to press we believe this book to provide the most complete and up-to-date information of its kind available.

This comprehensive and authoritative dictionary provides clear definitions of units, prefixes, and styles of weights and measures within the Système International (SI), as well as traditional, and industry-specific units. It also includes general historical and scientific background, covering the development of the sequential definitions and sizing of units. This new reference work will prove invaluable to professional scientists, engineers, technicians as well as to students and the general user. · Over 1,600 clear and concise entries complete with historical background · Covers a broad range of disciplines, including astronomy, electromagnetics, geology, photography, mathematics, meteorology, physics, and temperature · Notes on associated terminology · Numerous tables, including the geochronologic scale and the equation of time · Comprehensive coverage of the whole Système International

More than two thousand entries, in subjects from astronomy to zoology, are accompanied by tables and charts, as well as biographies of eighty-five scientists.

Whether looking for the definition of "density" or trying to understand what a "Bravais lattice" is, readers need turn to only one book: The New Penguin Dictionary of Science. Completely updated in its second edition, this accessible work covers both fundamental and esoteric concepts within every field of scientific inquiry, from chemistry and astronomy to molecular biology and human anatomy. Definitions are succinct and backed by hundreds of illustrations and diagrams. Including appendices that cover the periodic table, the classification of living organisms, and more, this book is a vital tool for students, researchers, and lay enthusiasts.

Prepared by the IUPAC Physical Chemistry Division this definitive manual, now in its third edition, is designed to improve the exchange of scientific information among the readers in different disciplines and across different nations. This book has been systematically brought up to date and new sections added to reflect the increasing volume of scientific literature and terminology and expressions being used. The Third Edition reflects the experience of the contributors with the previous editions and the comments and feedback have been integrated into this essential resource. This edition has been compiled in machine-readable form and will be available online.

Features short biographies of leading scientists, full page illustrated features on subjects such as the Solar System and Genetically Modified Organisms and chronologies of specific scientific subjects.

Balloons & marginal instructions; Writing a scientific paper; Preparation of the typescript and figures; Speaking at scientific meetings; Addressed to those for whom english is a foreign language; An appeal to north americans; Preparation of a dissertation or thesis; Biblliography; Index.

Helps physicians convert older metric units to proper Systeme International units.