outdoor,
Light, influence of, on trees,
Limbs, various methods of bracing,
Lime-sulphur wash,
Lime-tree,
Linden, American,
-- borer,
--, European,
Liquidambar styraciflua,
Liriodendron, tulipifers,
Location of trees, care to be exercised in,
Locust,
--, black,
-- borer,
--, common,
--, honey,
-- miner,
--, yellow,
Lombardy or Italian poplar,
Low juniper,

Magnolia acuminata,
--, mountain,
-- soulangeana,
--, Soulange's,
-- tripetala,
Magnolias, the,
Maiden-hair fern,
-- or gingko tree,
Maple wood,
--, ash-leaf,
--, hard,
--, Japanese,
--, Norway,
-- phenacoccus,
--, red,
--, rock,
--, silver,
--, soft,
-- sugar,
-- swamp,
--, sycamore,
--, white,
Mesophytes,
Method of covering wounds,
Methods of destroying injurious insects,
Mockernut hickory,
Moisture a factor in developing disease,
--, influence of, on trees,
Moral influence of trees,
Morus alba,
-- rubra,
Moth, gipsy,
--, leopard,
Mountain magnolia,
Mugho pine,
Mulberry, red,
--, white,

National forests,
Needle-shaped leaves,
Nettle tree,
Newark, N.J.,
Northern white cedar (arbor-vitae),
Norway maple,
-- spruce,
Nursery, tree,

Oak,
--, black,
--, pin,
--, red,
--, scarlet,
--, swamp white,
--, white,
--, yellow,
Oaks and chestnut,
Observations about trees, general,
-- and precision, child training in,
Obtuse Japanese cypress,
Opposite branched trees,
Orange, Osage,
Oriental spruce,
-- sycamore,
Osage orange,
Ostrya virginiana,
Outdoor lesson on trees,
Oyster-shell scale,

Paper birch,
Picea canadensis,
-- excelsa,
-- mariana,
-- orientalis,
-- parryana,
-- pungens,
Pignut hickory,
Pin oak,
Pine, Austrian,
--, Bhotan,
--, Mugho,
--, red,
--, Scotch,
-- trees,
-- weevil, white,
--, white,
Pines,
Pinus Austriaca,
-- excelsa,
-- mughus,
-- resinosa,
-- rigida,
-- strobus,
-- sylvestris,
Pitch pine,
Pith,
Plane or sycamore tree,
Plant lice, or aphides,
-- study, value of, for children,
-- trees, how to,
Planting forests,
-- forests with seedling trees,
-- little trees, methods of,
--, improving woodland by,
-- new trees,
-- trees,
-- -- most economical method,
-- -- on land unsuitable for crops,
Plants, adaptation of, to seasonal changes,
Platanus occidentalis,
-- orientalis,
Polyporus betulinus,
Poplar, balsam,
--, Carolina,
--, Lombardy or Italian,
--, silver,
--, tulip,
--, white,
--, yellow,
Populus alba,
-- balsamifera,
-- deltoides,
-- grandidentata,
-- nigra