.2541

.2542

Control of growth.

Temporary storage of stock.

Planting.

Kinds and classes of plant material.
Methods.

.2543 Sites and effect of cover.

.2544

Care and protection of plantations.

.2545 For investment.

.2546 For windbreaks and shelter belts.

.2547

.2548

For watershed.

.87112.)

protection.

(See also

Shade and ornamental trees, hedges, willow holts, etc.

.255 Costs and cost keeping.

.256

Tools and equipment.

.257

.258

Underplanting.

Tree introduction.

.2581 Introduction of exotics.

.2582 Extension of range of native species. .259 Tree breeding.

.29 Miscellaneous.

.3 Forest protection.

.30 General.

.31 Fire. (See also .861.)

.310 General.

.311 Prevention.

.312 Detection.

.3121 Airplane patrol.

.313 Suppression.

.319 Miscellaneous.

.32 Animals.

.320

General.

Erosion (including shifting sand).

.369 Avalanches.

.41215

Wheeling.

Trucking.

Sled hauling.

Trail chuting and trail sliding.

.4122 Steam, electricity, or gas..

.41221 Power skidding and aerial tramways. .41222 Logging railroads.

.41223

Tractors.

.4123 Water.

,42

.41233 Fluming and sluicing.

.41234 Barging.

.4124 Gravity chutes and timber slides.
.4125 Hand logging.

.413 Logging equipment and depreciation.

.414

.415

Log grades.

Logging costs.

Logging administration.

Camp management.

.416

.417

.4171

.4172

Camp equipment.

Commissary and dietary.

.4173 Camp sanitation.

.4174 First aid and medical data.

.4175 Veterinary data.

.419 Miscellaneous.

Lumber manufacture.

.420 General.

.421

Manufacturing plant.

.4211 Log_storage.

.42111 Water storage.
.42112 Land storage.
Sawmill equipment.
Conveyor system.

.4212

.4213

.4214

.4215

Power plant.

Yards.

.4216 Dry sheds.

.4217

Dry kilns.

.422 Milling.

.4221

Sawing.

4222

Resawing.

.4223

Edging.

.4224

Trimming.

.4225

Piling and stacking.

4 Lumbering-Continued...

.42

43

Lumber manufacture

Continued.

.423 Remanufacture of lumber.

.424 Other sawmill products; milling by-products. .4241 Sash and doors.

.4242

.4243

.4244

4245

.4246

Lath.

Shingles.
Flooring.
Sawdust.

Wood fuel.

.425 Disposal of mill refuse.

.426 Lumber grades and inspection.

.427

.429

Manufacturing administration.
Miscellaneous.

Special products (principally rough wood prod-
ucts, in part from sawmills).

.430 General.

.431 Poles.

.439 Miscellaneous.

.44 Wood-using industries;

.440

uses of woods. (For

pulp and paper and wood distillation see also .522 and .523.)

General.

Miscellaneous (alphabetically by industries).

.45 Marketing of products.

.445

.446

.447

.448

.449

Methods of selling.

Transportation; freight rates.

Distribution and markets.

Shipping weights.

Miscellaneous.

.46 Lumbering accounting.

General.

Physical properties of wood.

Mechanical properties; timber mechanics; timber testing.

Wood chemistry.

Conditioning of wood.

.5131 Air seasoning.

.5132

Kiln drying.

U. S. D. A.-10-1-26

.5

.51

Forest technology-Continued.
Wood technology-Continued.
.514 Wood preservation.
.5141 Preservatives.

.52

.5142 Methods and costs.

.5143 Treating plants and apparatus.

.5144

.515
.516

.519

Fireproofing.

Fuel value of wood.

Wood substitutes.

Properties and uses

species).

of individual

woods,

foreign and domestic (by general and

Forest by-products; derived products.
General.

.520

.521

Naval stores; turpentine orcharding.

.5211 Distillation of crude turpentine.

.5212

.5213

.5214

.5215

.522

Wood pulp and paper.

.523 Wood distillation.

Tanning materials.

.6

.524

.525

Sugar.

.526

Rubber and gums.

.527

Dyestuffs.

.528

Cork.

Lookout towers and special protective works.
Miscellaneous.

.64 Hydraulic engineering (including reservoirs, dams,

701 Determining the cut in the woodland.
.702 Group selection.

703 "Cut and try" method.

.71 Forest mensuration. .710 General.

.7

Forest management-Continued. .71 Forest mensuration-Continued. .711 Measurement of logs.

.7111

Board measure; log rules; scaling. .7112 Cubic measure.

.712

Measurement of lumber.

Measurement of other forest products.
Measurement of felled trees.

.713

.714

.715

.7151

.7152

.7153

Measurement of standing trees.
Diameter.

.7154

Height.

Volume tables (alphabetically by species). Taper tables (alphabetically by species). .7155 Form factors (alphabetically by species). .716 Determination of contents of stands. Measurement of all trees.

Volume growth or increment.

.7175 Growth of stands and yield.

.71751 Yield tables.

.71752 Permanent sample plots.

.719 Miscellaneous.

.72 Forest finance.

Economic and mathematical principles.
Investments and costs in forest production.
Valuation of forest soil; land values.

.7214 Valuation of growing stock or timber.
Valuation of entire forests.

.7215

7216

.7217

.722

Stumpage values and appraisals.
Appraisal of damages.

Forest statics; comparison of forest values.
Determination of profits in forestry.

.7221

Determination of forest per cent.

.7223 Financial test of methods of treatment.

.731 Fundamental premises and principles.

.7311 The increment.

.7312 The rotation.

.7313 The cutting cycle.

.732 Forest working plans.

.7321 Forest survey; timber survey; forest recon

.7322

.7323

naissance; collection of data.

Determination of methods of treatment.

Regulation of yield; determination of felling budget.

.7324 Control and revision of working plans;

working-plan control.

.7325 Forest working plans for special areas. .739 Miscellaneous.

U. S. D. A.-10-1-26