I. Paws and Claws. II. Cocoa-Nut. III. Cotton and Wool. IV. An Egg. V. Acorn and Hazel-Nut. VI. Milk. VII. Onion, Turnip, Carrot. VIII. Cat and Dog. IX. Down. X. A Quill Feather. XI. Gutta Percha. XII. Leaves. XIII., XIV. and XV. Starch. XVI. The Horse. XVII. The Cow and the Sheep. XVIII. Honey and Wax. XIX. Ivory. XX. and XXI. Seeds and Seedlings. XXII. Olive Oil. XXIII. Liber. XXIV. Mammals and Birds. XXV. Reptiles and Fishes. XXVI. Mammals. XXVII. Chewing the Cud. XXVIII. Horns and their Uses. XXIX. Parts of a Flower. XXX. Birds’ Nests. XXXI. The Hedgehog. XXXII. Whale Oil. XXXIII. Leather. XXXIV. The Mole. XXXV. Cotton. XXXVI. Vertebrata and Invertebrata. XXXVII. The Cockroach. XXXVIII. The Earthworm. XXXIX. Spider’s Threads. XL. Bleaching. XLI. The Rat and His Relatives. XLII. Beaks of Birds. XLIII. and XLIV. Snakes. XLV. and XLVI. Fishes. XLVII. Insects--Form and Structure. XLVIII. Insects--Benefits and Injuries. XLIX. Insects,--Metamorphosis. L. Insects, Legs and Feet. LI. Insect and Spider. LII.-LIV. Legs and Feet,--Mammals. LV.-LVI. Legs and Feet,--Birds. LVII. Flour. LVIII. The Frog. LIX. The Frog,--Life History. LX. and LXI. Eggs. LXII. Snails. LXIII. Snails--Whelk and Periwinkle. LXIV. Snails. LXV. The Amoeba and Foraminifera. LXVI. The Hydra. LXVII. Sea Anemones and Corals. LXVIII. Plant Factories. 352 pages. 121 illustrations and seven plates. Cloth $1.50. _ELEMENTARY SCIENCE._ _Natural History Object Lessons._ A Manual for Teachers. By GEO. RICKS, Inspector of Schools, London School Board. Cloth. 352 pages. Retail price, 1.50. _Guides for Science-Teaching._ Published under the auspices of the =Boston Society of Natural History=. For teachers who desire to practically instruct classes in Natural History, and designed to supply such information as they are not likely to get from any other source. 26 to 200 pages each. Paper. I. HYATT’S ABOUT PEBBLES, 10 cts. II. GOODALE’S FEW COMMON PLANTS, 20 cts. III. HYATT’S SPONGES, 20 cents. IV. AGASSIZ’S FIRST LESSON IN NATURAL HISTORY, 25 cts. V. HYATT’S CORAL AND ECHINODERMS, 30 cts. VI. HYATT’S MOLLUSCA, 30 cts. VII. HYATT’S WORMS AND CRUSTACEA, 30 cts. VIII. HYATT’S INSECTS. XII. CROSBY’S COMMON MINERALS AND ROCKS, 40 cts. Cloth, 60 cts. XIII. RICHARDS’ FIRST LESSONS IN MINERALS, 10 cts. XIV. BOWDITCH’S HINTS FOR TEACHERS ON PHYSIOLOGY, 20 cts. XV. CLAPP’S OBSERVATIONS ON COMMON MINERALS, 30 cts. _Note Book._ _To accompany Science Guide No. XV._ Paper. 48 pages, ruled and printed. Price, 15 cents. _Science teaching in the Schools._