. 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. Étude de l'arbre 8ii hazel feuilles sont susceptibles d'être vacances maisons pour les insectes, notamment les insectes qui rendent les galles. Il y a beaucoup de ces espèces, chacune faisant une diffei forme ent gall. L'un des plus communs est un culot, en forme de petite corne ou un épi sur la face supérieure de la feuille et avoir une petite porte qui s'ouvre sur la face inférieure de la feuille. Si l'une de ces maisons est peu confortable à ouvrir, il sera trouvé occupé par une communauté de peu les pucerons, ou les poux. La sorcière-hazel bloss

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. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. Tree Study 8ii hazel leaves are likely to be apartment houses for insects, especially the insects that make galls. Of these there are many species, each making a diffei ent shaped gall. One of the most common is a gall, shaped like a little horn or spur on the upper side of the leaf and having a tiny door opening on the under side of the leaf. If one of these snug little homes is torn open, it will be found occupied by a community of little aphids, or plant-lice. The witch-hazel blossoms appear at the axil of a leaf or immediately above the scar from which a leaf has fallen, the season of bloom being so late that often the bush is bare of leaves and is clothed only with the yellow, fringe-like flowers. Usually the flowers are in clusters of three, but occa- sionally four or five can be found on the same very short stem. The calyx is four-lobed, the petals are four in number, shaped like tiny, yellow ribbons, about one-half inch long and not much wider than a coarse thread. In the bud, these petals are rolled inward in a close spiral, like a watch- spring, and are coiled so tightly that each bud is a solid little ball no larger than a bird-shot. There are four stamens lying between the petals, and be- tween each two of these stamens is a little scale just opposite the petal. The anthers are most interesting. Each has two little doors which fly open, as if by magic springs, and throw out the pollen which clings to them. The pistil has two stigmas, which are joined above the two-celled seed-box, or ovary. The blossoms sometimes open in late September, but the greater number appear in October and November. They are more beautiful in November after the leaves have fallen, since these yellow, starry flowers seem to bring light and warmth into the landscape. After the petals fall, the calyx forms a beautiful little urn, holding the growing fruit. The nuts seem to

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