Glossary of Terms Used in Forest Fire Control

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1939 - Forest fires - 24 pages
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Page 12 - ... merchantable section. Usually expressed in feet or number of logs or bolts of some standard length. High-grading — The removal from the stand of only the best trees. Hot-and-cold bath — See preservation, methods of. Humidity, relative — The ratio of actual mass of water vapor per unit of volume to mass of water vapor that would saturate that volume at the same temperature and pressure, or roughly the per cent saturation of the space. Humus — The plant and animal residues of the soil,...
Page 1 - Azimuth plus 180 when Azimuth is 180 or less. Azimuth minus 180 when Azimuth is more than 180. Backfire. A fire intentionally set on the fire side of a control line as a part of the process of controlling a fire. (Using such a fire when the control line is close to the fire edge is sometimes called "burning out" or "clean burning".) Base Camp.
Page 3 - Incendiary. Fires that in the judgment of the reporting officer are deliberately set by anyone with the intention of burning over land or damaging property not owned or controlled by him.
Page 8 - A natural or constructed barrier made before a fire occurs, designed to stop or check fires that may occur, or to be used as a line from which to work.
Page 22 - Two or more men stationed at a strategic location, either regularly or in an emergency, for initial action on fires. Duties are essentially the same as those of individual firemen.
Page 10 - Fire, forest. Any fire on forest land which is not being used as a tool in forest protection or management in accordance with an authorized plan.
Page 21 - ... Strip burning. Burning the slash on strips usually 100 to 300 feet wide, along roads or barriers in such a way as to subdivide the slashing into blocks with natural protection advantages. Except in the strips the slash remains untreated. 5. Quema en manchones. Spot burning. A modified form of broadcast burning in which only the heaviest accumulations of slash are fired and the fire is not allowed to spread over the entire out-over area.
Page 9 - A healing or healed over injury or wound caused or accentuated by fire in the trunk or other large woody part of a tree. Scrub — Stunted trees or brush often in dense stand. Season — To dry lumber, either in the open or in a dry kiln. Season, fire — The period or periods of the year during which fires are likely to occur, spread, and do sufficient damage and otherwise warrant organized fire control.
Page 13 - Litter. The top layer of the forest floor which consists of loose debris of dead sticks, branches, twigs, and recently fallen leaves or needles, the structures of which have been little altered by decomposition.
Page 22 - ... frame-like piece of furniture used for protection against the heat of the fireplace. Fire season. 1. The period or periods of each year during which fires will start and spread. 2. For purposes of fire finance, the average period during which the regular shortterm fire control forces must be employed. Fire suppression. All the work of extinguishing a fire, beginning with its discovery. Fire trap. An accumulation of especially inflammable material in a danger area. Fire-weather warning. Prediction...

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