THE present volume is, like its predecessors, "Science from an Easy Chair" (Series I and Series II) and "Diversions of a Naturalist"—mainly a revision and reprint—with considerable additions—of articles published in daily or weekly journals. The first chapter appeared originally in "The Field." The Chapters VI, XX, XXI, and XXII were published in the "Illustrated London News," under the title "About a Number of Things." The rest are some of the articles which, as "Science from an Easy Chair," I contributed, during seven years, to the "Daily Telegraph." That, to me very happy, conjunction was, like so many other happy things, necessarily interrupted by the Great War.