Coming close to the tree, the pupils may first examine the trunk. By using a string or tape-line, find its diameter and how big it is around. Tell them how big some evergreens are (the giant trees of the Pacific Coast are sometimes over forty feet around). Have them notice where the trunk is largest, and let them find out why a tree needs to be so strong at the ground. Heavy wind puts a great strain on it just at this point. Illustrate by taking a long slat or lath, drive it into the ground firmly, and then, catching it by the top, push it over. It will break off just at the ground. If a little pine tree could be taken up, the pupils would be interested in seeing what long, strong, fibrous roots the pine has. Let them examine the bark of the trunk and describe its colour and roughness. The fissures in the bark, which are caused by the enlarging of the tree by the formation of new wood under the bark, are deeper at the bottom of the tree than at the top, the tree being younger and the bark thinner the nearer to the top we go. Let the pupils look up into the tree from beneath and then go a little distance away and look at it. They will notice how bare the branches are on the inside, and the teacher will probably have to explain why this is so. They will discover that the leaves are nearly all out toward the ends of the branches as they get light there, while the centre of the tree top is shaded, and the great question that every tree must try to solve is how to get most light for its leaves. The pupils will now see an additional reason why the lower limbs should be longer than the upper ones. The greater length of the lower limbs brings the leaves out into the sunlight. The reason for calling this tree an "evergreen" may now be considered. Why it retains its leaves all winter is a problem for more advanced classes; but if the question is asked, the teacher may get over the difficulty by explaining to the class that the leaves are so small, and yet so hardy, that wind, frost, or snow does not injure them. Each pupil may bring a small branch or twig back to the school-room for use in a class-room lesson. CLASS-ROOM LESSON ~Materials.~--Small branches--one for each pupil, cones, bark, pieces of pine board. ~Introduction.~--Review the general features of the pine that were observed in the field lesson. ~Observations.~--The branches are distributed. Pupils test the strength and suppleness of the branches and find the gummy nature of the surface. Of what value are these qualities to the tree during winter storms? Examine the texture, stiffness, and fineness of the needles. Note that the needles are in little bunches. How many are in each bunch? Are there any buds on the branches? If so, where are the buds? How are the buds protected from rain? The pupils examine the cones and describe their general shape. The pupils are asked to break open the tough scales and find the seeds.