_Winter and spring work._--Begin the study of trees. Choose some tree in the schoolyard, if possible, and make this the basis of the work. The following is an outline for the study of a maple tree: Begin observations in January. Make drawings of the tree, showing the relations of branches to trunk and general outline. Note the following details: The color of trunk and branches in January, and the color in February and March; when the buds begin to swell; the arrangement of buds; watch closely to determine whether a bud develops into a blossom or a leaf; the peculiarities of bark on trunk and branches; do the leaves or the blossoms appear first; the shape and color of the blossoms; draw them and study them thoroughly; the color and position of the leaves when they first appear; draw the different stages of the unfolding of the leaves; keep a calendar of all the year's history of the tree; when in full leaf make another drawing of the whole tree; study the tree from below, and if possible from above, to show arrangement of leaves in reference to light; make drawings of the fruit when it is formed; study how it travels; when the first autumn tints appear; make colored drawings of the tree in its autumn foliage, and note when leaves begin to fall and when the branches are finally bare; note different form of maple in the open and maple in the forest. In connection with the year's history of the tree, study the tree from an economic point of view. Make a special study of sugar-making in connection with the maple tree. Study maple wood. To do this get a quarter section of a piece of maple log and study the grain lengthwise and in cross sections. Study all the industries possible in which maple is used. Devote one notebook to all the work on the maple tree, and at the end summarize the observations. For drawing of trees, see Cornell Teachers' Leaflet, No. 12 (Nos. XXIX and XXX, this volume). Home Nature-Study, Vol. V, Nos. 2, 5. FIFTH GRADE. The work during this grade may be devoted to plant physiology. For this work use First Studies of Plant Life, Atkinson. The experiments described in this book are simple and excellent; they give the pupil definite knowledge of the life processes of plants, and the use to the plant of roots, stems, leaves, flowers, and fruit. Continue studies of trees. Select some other species than the one studied during the last grade. Study it in the same way. Note the differences between the two. Two or three contrasting species may thus be studied. SIXTH GRADE. Having studied in the previous year the uses of different parts of the plant, the pupil will be fitted now to take up the general subject of weeds. Take some common forms and let the pupils observe that they grow where other plants do not grow, or that they drive out other plants; then study the special reasons why each kind of weed is able to do these things. Botany, Bailey, pp. 214-222; Elements of Botany, pp. 196-205.