Select a convenient sugar maple as a type. Ask the pupils to observe and to describe the height of the tree, the height of the trunk below the branches, the shape and size of the crown, the diameter of the trunk, the colour of the bark, the markings on the bark, the number and direction of the branches, and the density of the foliage. Compare the density of the foliage with that of other kinds of trees. Require the pupils to make a crayon drawing of the tree. Examine the crop of grain produced near a shade tree. Compare the crop on the north side of the tree with that on the south side. Account for the difference. Is the crop around the tree inferior to that in the rest of the field? Find out how long the various sugar maple shade trees in the locality have been planted. Is it a tree of rapid or slow growth? Are these sugar maples infested with insects or attacked by fungi? Do these trees yield sap that is suitable for making maple syrup? Examine trees that have been tapped and find whether the old wounds become overgrown or cause decay. Find out all you can about the uses that are made of maple wood. _To the teacher._--The sugar maple is the most highly prized of our native trees for ornament and shade. It grows fairly rapidly and becomes a goodly-sized tree within twenty years after it is planted. The symmetrical dome-shaped crown and the dense foliage of restful dark green give to it a fine appearance. It is hardy and has few insect pests, and its value is enhanced by the abundant yield of rich sap. As a commercial tree it has few superiors; the wood is hard and durable and takes a high polish. It is used for flooring, furniture, boat building, for the wooden parts of machinery and tools, and for making shoe-pegs and shoe lasts. As fuel maple wood is surpassed only by hickory. MAPLE LEAVES CLASS-ROOM LESSON The pupils bring to the class leaves of the sugar maple. Each pupil is provided with a leaf and makes direct observations under the guidance of the teacher. ~Observations.~--Colour, dark green on the upper surface, lighter green on the lower surface. Surface smooth and shiny. Shape: star-shaped, broader than long. Lobes: usually five, often three; each lobe has usually two large teeth. Base has a heart-shaped notch; petiole long and slender, usually red. Veins are stiff and run out to the points of the teeth. Distribute leaves of the _red_ maple and ask the pupils to note the general resemblance. Next ask them to compare the leaves as to shape, texture, and teeth on the margin. Ask the pupils to find red maple trees and also to find maples with leaves that are different from those of the red maple and those of the sugar maple. Make a collection of maple leaves when they are in autumn colours. (See Collections, page 33, in General Method.)