TERMS USED IN LOGGING ^ 
(Letters in parentheses following definitioDs indicate the forest regions (see Fig. 1) in which 
the terms as defined are used. 
(Gen.) = General = In all forest regions of the United States. 
(C. H. F.) = Central Hardwood Forest. 
(N. F.) = Northern Forest. 
(App.) = Appalachian Forest. 
(L. S.) = Lake States Forest. 
(N. W.) = North Woods. 
(S. F.) = Southern Forest. 
(R. M. F.) = Rocky Mountain Forest. 
(P. C. F.) = Pacific Coast Forest. 
(E. C.) = Ea-stern Canada. 
(Cal.) = California. 
In a few instances very local terms are ascribed to a State instead of to a forest region.) 
Acid wood. Wood suitable for the manufacture of wood alcohol and other 
products of distillation. (N. F., App.) 
Aerial line. See Skyline. 
Aerial skidder. See Cableway skidder. 
Alder grab. The stem of an alder, or other small tree, which is bent over and 
plugged into a hole bored in a boom stick, or secured in some other way, 
to hold a boom or logs inshore. (N. F.) 
Alley, n. See Dingle. 
Alligator, n. 1. A boat used in handling floating logs. It can be moved 
overland from one body of water to another by its own power, usually ap- 
phed through drum and cable. (N. W., L. S.) 
2. See Go-devil. 
Anchor line. A line attached to a small buoy and to one fluke of an anchor 
u.sed in to^^^ng a raft of logs. It is employed to free the anchor when fast 
to rocks or snags. (N. F.) 
Angle bar. A steel plate with a flange base, having from four to six holes, 
through which bolts may be inserted. Two angle bars are used to hold 
steel rails together at the joints, one angle bar being placed against each 
side of the web and both bolted to it. (Gen.) 
Apron, n. LA platform projecting downstream from the sluiceway of a 
dam to launch well into the stream logs which pass through the sluiceway. 
(Gen.) 
2. A platform built of timbers at the foot of a shde, which guides in the 
desired direction logs leaving the shde. (Gen.) 
Ark, n. See Wanigan. 
At the base. When referring to the diameter of standing timber, a term used 
in timber contracts, meaning at the groimd as contrasted ^vnth the usual 
1 From Forest Terminology, Part II. Terms used in the Lumber In- 
dustry. Prepared by the Author as Chairman of a Committee of the Society 
of American Foresters. 
469 
