. Manuel d'étude de la nature pour les enseignants et les parents, en fonction de la nature de l'étude de Cornell de dépliants. L'étude de la nature. 700 Nature-Study Guide jo rien mais "Rogner", ils sont si ornemental. Chaque petite tasse ou une douille, de l'articulation ou nœud, en succursale ou une tige, se trouve une rangée de points autour de sa marge, et ces points sont des terminaux des angles dans la direction générale. Si une branche est triangulaire en section transversale, il aura trois points dans sa douille, si elle aura quadrangulaire 4 points, la tige principale peut avoir six ou une douzaine, ou encore plus de points. La tige principale et les branches sont faites u

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. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. 700 Handbook oj Nature-Study nothing but "trimming, " they are so purely ornamental. Each little cup or socket, of the joint or node, in branch or stem, has a row of points around its margin, and these points are terminals of the angles in the branch. If a branch is triangular in cross section, it will have three points at its socket, if quadrangular it will have four points, and the main stem may have six or a dozen, or even more points. The main stem and branches are made up entirely of these seg- ments, each set at its lower end in the socket of the segment be- hind or below it. These green branches, rich in chlorophyl, manufacture for the plant all the food that it needs. Late in the season this food is stored in the rootstocks, so that early next spring the fertile plants, nour- ished by this stored material, are able to push forth before most other plants, and thus develop their spores early in the season. There is a prothallium stage as in the ferns. Above where the whorl of stems comes from the main branch, may be seen a row of upward-standing points which are the remnants of leaves; each branch as it leaves the stem is set in a little dark cup with a toothed rim. There is a nice gradation from the stout lower part of the stem to the tip, which is as deli- cate as one of the side branches. The rootstock dies out behind the plant and pushes on ahead like the rootstock of ferns. The true roots may be seen attached on the under side. The food made in the summer is stored in little tubers, which may be seen in the rootstocks.. The sterile plant of the field horsetail, one-hat} natural size. LESSON CLXXVII The Field Horsetail The Fertile Plant Leading thought—The horsetail is a plant that develops spores instead of seeds, and has green stems instead of leaves. Method—In April and May, when the children are looking for flowers, they will find

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