2 JOURNAL OF FORESTRY 



Apron, n. (Log.) 1. A platform projecting down-stream from tlie 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 slide, which guides in the 

 desired direction logs leaving the slide. (Gen.) 



(Turp.) A galvanized sheet-iron strip which is placed above certain styles 

 of cups and which serves both to support the cup and to guide the crude tur- 

 pentine into it. (S. F.) 

 Syn.: tin. 

 Arbor, n. See Saw arbor. 

 Ark, n. See Wanigan. 



Arkansas dry kiln. An early form of kiln consisting of an open bos from 16 to 

 20 feet square with a platform about 8 feet above the ground, on which the 

 lumber is piled. The kiln is open at the top. A fire is built under the plat- 

 form and heat, sparks, and smoke pass up through the lumber, which gradually 

 becomes dry. (S. F.) 



At the base. When referring to the diameter of standing timber, a term used 

 in timber contracts meaning at the ground as contrasted to the usual custom 

 of measuring at the stump. (Supreme Court of North Carolina, 54 South- 

 eastern Eeporter, 844.) 



At the stump. In a timber contract, the point at which the bole is severed from 

 the stump. Local custom as to stump heights governs in case of litigation. 

 (Superior Court of New York, 126 New York State, 234.) 



Back, n. The upper or convex part of a saw tooth. (Gen.) 



Backbone, n. A triangular piece of wood which is placed in the apex of a V-box 



flume. (Gen.) 

 Back box, v. In turpentine orcharding, to cut an additional box or boxes, or to 



place additional cups on a bled tree during the third or fourth year it is 



worked. (S. F.) 

 Backing board. In sawing lumber on a head saw, the last lioard in the log to 



which the carriage dogs are attached. 



Syn.: dog board (Gen.), back stand (E. M. F.). 

 Backing chain. A chain used to prevent logging trucks from sliding under the 



logs. It is used chiefly on long trains where there is a great strain. (P. C. F.) 

 Back line. See Haul back. 

 Back-spiker, n. One of the members of a crew which completes the spiking of a 



railroad track after the rails have been laid by the steel gang. (Gen.) 

 Back stand. See Backing board. 

 Bagboom. An open "limber" boom used to impound logs at the mouth of a 



stream emptying into a lake or similar body of water. The ends are made fast 



to the shore below the mouth of the stream, and when the boom is filled the 



ends are brought together and closed, forming a round boom. (L. S.) See 



Round boom. 

 Ballhooter, n. One who rolls or slides logs down a hillside. (App.) 

 Band mill. 1. A sawmill equipped with a band head-saw. (Gen.) 



2. A machine on which band saws are mounted. (Gen.) 

 Band saw. An endless, beltlike blade of steel, toothed on one or both edges, 



which is used to saw lumber. (Gen.) 

 Bank, n. 1. See Landing. 



2. The logs cut or skidded in one day above the required amount and heb', 



over by the saw crew or skidders, to be reported when the required daily num- 

 ber is not reached. (N. F.) 

 Bank, v. See Bank up, to. 

 Banking gound. See Landing. 



