Produced by Thiers Halliwell, Chris Curnow and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Transcriber’s notes: The text of this e-book has been preserved in its original form apart from correction of several typographic errors: (rog → frog, arrranged → arranged, downword → downward, and → of (in journal title), developes → develops). Inconsistent use of accents and hyphenation, and inconsistent spelling, e.g. referable/referrible, has not been altered. Several redundant parentheses have been deleted. Paragraphs of quoted text on pp. 17–19 are incomplete and/or paraphrased (compared with the original source); ellipsis dots have been inserted to indicate text omissions, and quotation marks inserted where they were lacking. Some illustrations have been moved nearer to the relevant text and their location therefore does not necessarily correspond to that shown in the List of Illustrations. Footnotes have been numbered and positioned below the relevant parapraphs. THE INTERNATIONAL SCIENTIFIC SERIES. LIST OF THE VOLUMES ALREADY PUBLISHED. *THE FORMS OF WATER IN RAIN AND RIVERS, ICE AND GLACIERS.* By J. TYNDALL, LL.D., F.R.S. With 26 Illustrations. Third Edition. Crown 8vo. 5s. “One of Professor Tyndall’s best scientific treatises.”--_Standard._ “With the clearness and brilliancy of language which have won for him his fame, he considers the subject of ice, snow, and glaciers.”--_Morning Post._ “Before starting for Switzerland next summer every one should study ‘The Forms of Water.’”--_Globe._ “Eloquent and instructive in an eminent degree.”--_British Quarterly._ *PHYSICS AND POLITICS*; or, THOUGHTS ON THE APPLICATION OF THE PRINCIPLES OF “NATURAL SELECTION” AND “INHERITANCE” TO POLITICAL SOCIETY. By WALTER BAGEHOT. Crown 8vo. Second Edition. 4s. “We can recommend the book as well deserving to be read by thoughtful students of politics.”--_Saturday Review._ “Able and ingenious.”--_Spectator._ “A work of really original and interesting speculation.”--_Guardian._ *FOODS.* By Dr. EDWARD SMITH. Profusely Illustrated. Second Edition. Price 5s. “A comprehensive résumé of our present chemical and physiological knowledge of the various foods, solid and liquid, which go so far to ameliorate the troubles and vexations of this anxious and wearying existence.”--_Chemist and Druggist._ “Heads of households will find it considerably to their advantage to study its contents.”--_Court Express._ “A very comprehensive book. Every page teems with information. Readable throughout.”--_Church Herald._ *MIND AND BODY*: THE THEORIES OF THEIR RELATIONS. By ALEXANDER BAIN, LL.D., Professor of Logic at the University of Aberdeen. Four Illustrations. Second Edition. 4s. *THE STUDY OF SOCIOLOGY.* By HERBERT SPENCER. Crown 8vo. Second Edition. Price 5s.