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CONTENTS: Oxygen in the Sun-Sun-Spot, Storm and Famine-New Ways of Measuring the Sun's Distance-Drifting Light-Waves-The New Star which Faded into Star-Mist-Star-Grouping, Star-Drift, and Star-Mist-Mallet's Theory of Volcanoes-Toward the North Pole-A Mighty Sea Wave-Strange Sea Creatures-On Some Marvels in Telegraphy-The Phonograph, or VoiceRecorder-The Gorilla and Other Apes-The Use and Abuse of Food-OzoneDew-The Levelling Power of Rain-Ancient Babylonian Astrogony. NICHOLS' ELEMENTARY GEOMETRY. Elementary and Constructional Geometry. By EDGAR H. NICHOLS, A.B., of the Browne & Nichols School, Cambridge, Mass. 12mo, 150 pages. 75 cents. This is an elementary work newly prepared by the principal of the Browne & Nichols School, Cambridge, Mass., mainly with reference to the recommendations of the National Committee of Ten, and is designed for pupils beginning geometry at the age of twelve or even younger. It is based upon the author's class-room experience with young boys and is an attempt to supply a work in geometry adapted to grammar grades. CLAY-MODELLING. By MARY LOUISA HERMIONE UNWIN, Examiner in Clay-modelling to the Educational Handwork Union. A Manual of Clay-modelling for Teachers and Scholars. With 66 Illustrations and a Preface by T. G. Rooper, M.A. Balliol College, Oxford. 12mo. $1.00. The course set forth in this Manual is suitable for children of six or seven years of age and upwards. It is a great advantage to young children to learn to handle the clay and to become accustomed to using it. They will be found greatly to enjoy its mere manipulation They may begin with the simplest objects, such as beads, round or flat, of different sizes; cherries with string or wicker stalks. 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