Book Review: The Fluid Envelope of Our Planet: How the Study of Ocean Currents Became a ScienceMillsEric L., The Fluid Envelope of Our Planet: How the Study of Ocean Currents Became a Science. Toronto: University of Toronto Press [www.utppublishing.com], 2010. xii + 434 pp., illustrations, figures, photographs, appendix, endnotes, bibliography, index. CDN $75, cloth; ISBN 978-0-8020-9697-5.