—­, nature and habits of individual,
—­, needs that nature or man must supply,
—­, outdoor lesson on,
—­, physical character of soil important for production of,
—­, planting, on land unsuitable for crops,
—­, pruning, fundamental principles,
—­, —­, how to cut properly,
—­, quality,
—­, rapidity of growth of different species,
—­, requirements of,
—­, seasons for spraying,
—­, setting,
—­, structure of,
—­, study of rings of various species,
—­, suggestions for outdoor study of,
—­, suggestions, for planting little,
—­ suitable for the soil, care in selecting,
—­, tendency to split,
—­, thoroughness essential in spraying,
—­, time for pruning,
—­ told by their bark or trunk,
—­, training a child to recognize,
—­, value of, as health givers and moral uplifters,
—­, what to plant and how,
—­, when and how to procure,
—­, when to plant,
—­, when to spray,
—­, wooded areas improved by planting new,
—­, yew,
Tsuga canadensis,
Tulip poplar,
—­ tree,
Tussock moth,

Ulmus americana,
—­ campestris,
Umbrella pine, Japanese,
—­ tree,

Value of plant study for children, —­ of tree and nature study, —­ of trees as health givers and moral uplifters,

Walnut,
—­, black,
Wasteful lumbering,
Weeping willow tree,
Western catalpa,
Whale-oil soap,
White ash,
—­ birch, European,
—­ cedar,
—­ elm,
—­ flowering dogwood,
Whiteheart hickory,
White maple,
—­ mulberry,
—­ oak,
—­ oak, swamp,
—­ or gray birch,
—­ pine,
—­ pine weevil,
—­ poplar,
—­ spruce,
Whitewood,
Willow, weeping,
—­, pussy,
Wood, diffuse-porous,
—­, diseased, disposal of,
—­, early,
—­ fibers,
—­, how to identify specimens,
—­, how to judge quality of,
—­, late,
—­ medullary rays,
—­ parenchyma,
—­ resin ducts,
—­, ring-porous,
—­ spring,
—­, structure, of,
—­ summer,
Woodland, care of the,
—­ how to improve by removing trees,
—­ how to judge, unfavorable conditions,
—­ trees,
Woodlands, other means of protecting,
Woodlot, small cost of well-selected young trees for the,
Wood, structure of,
Wooded areas improved by planting new trees,
—­ areas, preserving soil of,
Woods, identification, properties and uses of common,
—­, ring-porous,
—­ with large and conspicuous rays,
—­ with pores,
—­ with resin ducts,
—­ with small and inconspicuous rays,
—­ without pores,
—­ without resin ducts,
Wounds, importance of covering,
—­, methods of covering,
—­, treating surface,

Xerophytes,

Yellow birch,
—­ locust,
—­ oak,
—­ poplar,
Yew, English,
Yew trees,
Young trees for the woodlot, small cost of well-selected,