Seasoning of Wood Part 28

=Alb.u.men.= A name applied to the food store laid up outside the embryo in many seeds; also nitrogenous organic matter found in plants.

=Alburnam.= Sapwood.

=Angiosperms.= Those plants which bear their seeds within a pericarp.

=Annual rings.= The layers of wood which are added annually to the tree.

=Apartment kiln.= A drying arrangement of one or more rooms with openings at each end.

=Arborescent.= A tree in size and habit of growth.

=Baffle plate.= An obstruction to deflect air or other currents.

=b.a.s.t.a.r.d cut.= Tangential cut. Wood of inferior cut.

=Berry.= A fruit whose entire pericarp is succulent.

=Blower kiln.= A drying arrangement in which the air is blown through heating coils into the drying room.

=Box kiln.= A small square heating room with openings in one end only.

=Brittleness.= Aptness to break; not tough; fragility.

=Burrow.= A shelter; insect's hole in the wood.

=Calorie.= Unit of heat; amount of heat which raises the temperature.

=Calyx.= The outer whorl of floral envelopes.

=Capillary.= A tube or vessel extremely fine or minute.

=Case-harden.= A condition in which the pores of the wood are closed and the outer surface dry, while the inner portion is still wet or unseasoned.

=Cavity.= A hollow place; a hollow.

=Cell.= One of the minute, elementary structures comprising the greater part of plant tissue.

=Cellulose.= A primary cell-wall substance.

=Checks.= The small c.h.i.n.ks or cracks caused by the rupture of the wood fibres.

=Cleft.= Opening made by splitting; divided.

=Coa.r.s.e-grained.= Wood is coa.r.s.e-grained when the annual rings are wide or far apart.

=Cohesion.= The union of members of the same floral whorl.

=Contorted.= Twisted together.

=Corolla.= The inner whorl of floral envelopes.

=Cotyledon.= One of the parts of the embryo performing in part the function of a leaf, but usually serving as a storehouse of food for the developing plant.

=Crossers.= Narrow wooden strips used to separate the material on kiln cars.

=Cross-grained.= Wood is cross-grained when its fibres are spiral or twisted.

=Dapple.= An exaggerated form of mottle.

=Deciduous.= Not persistent; applied to leaves that fall in autumn and to calyx and corolla when they fall off before the fruit develops.

=Definite.= Limited or defined.

=Dew-point.= The point at which water is deposited from moisture-laden air.

=Dicotyledon.= A plant whose embryo has two opposite cotyledons.

=Diffuse.= Widely spreading.

=Disk.= A circular, flat, thin piece or section of the tree.

=Duramen.= Heartwood.

=Embryo.= Applied in botany to the tiny plant within the seed.

=Enchinate.= Beset with p.r.i.c.kles.

=Expansion.= An enlargement across the grain or lengthwise of the wood.

=Fibres.= The thread-like portion of the tissue of wood.

=Fibre-saturation point.= The amount of moisture wood will imbibe, usually 25 to 30 per cent of its dry-wood weight.

=Figure.= The broad and deep medullary rays as in oak showing when the timber is cut into boards.

=Filament.= The stalk which supports the anther.

=Fine-grained.= Wood is fine-grained when the annual rings are close together or narrow.

=Germination.= The sprouting of a seed.

=Girdling.= To make a groove around and through the bark of a tree, thus killing it.