us countries,
--, what it is and what it does,
Forests, grazing cattle in, a source of injury,
Forest Service, U.S.,
--, harvesting,
--, harvesting of, to increase production,
--, how established,
--, how harvested,
--, how protected,
--, how they help to regulate streams and prevent floods,
--, method of establishing,
--, planting, with seedling trees,
-- prevent soil erosion,
--, protecting from destructive agencies,
--, safeguarding,
--, utilization of by-products,
Fraxinus americana,
-- nigra,
Frost, effect of, on trees,
Fungi and insects, protection against,
-- as factors of disease,
Fungous diseases attacking cavities,
-- diseases, spraying for,
Fungus, fruiting body of,

Gingko biloba,
-- or maidenhair tree,
Gipsy moth,
Gleditsia triacanthos,
Gloeosporium nervisequum,
Gray or white birch,
Grazing effect on forests,
Grove and lawn, study of soil conditions on,
Gum, red or sweet,
Gymnocladus dioicus,

Hackberry tree,
Hackmatack,
Hard maple,
-- pines,
"Hardwoods," or broadleaf trees,
Hardy catalpa,
Harvesting forests,
Harvesting of forests to increase production,
Hawthorn, English,
Healthy tree, conditions which indicate,
Heartwood,
Heat, effect of, on trees,
Hemlock,
-- and spruce, description of,
Hickory,
-- bark borer,
--, bigbud,
--, bitternut,
--, broom,
--, brown,
--, mockernut,
--, pignut,
--, shagbark,
--, shellbark,
--, whiteheart,
Hicoria alba,
-- glabra,
-- minima,
-- ovata,
Honey locust,
Hop hornbeam,
Hornbeam, (blue beech),
Horsechestnut,
--, red,
Humus,
Hydrophytes,

Important insects,
Improperly pruned trees,
Indian bean,
Individuality of trees,
Insects and fungi, protection against,
--, boring,
--, chewing,
-- galls,
--, important kinds of,
-- injurious to trees,
--, leaf-eating,
--, methods of destroying injurious,
--, nature, habits and influences of,
--, sucking,
--, the four stages, or life history of,
Ironwood tree,
Italian or Lombardy poplar,

Japanese maple,
-- umbrella pine,
Juglans cinerea,
-- nigra,
Juniper,
Juniperus communis,
Juniperus virginiana,

Kerosene emulsion,
Knees, cypress,

Larch, American,
-- and cypress, description of,
-- European,
Large-toothed aspen,
Larix europaea,
Lawn and grove, study of soil conditions on,
Lawn trees,
-- --, pruning,
Leaf blotches,
Leaf-eating caterpillars,
----, insect,
Leaves,
--, needle-shaped,
--, scale-like,
--, star-shaped,
Lenticels,
Leopard moth,
Lesson on trees,