TERMS USED IN FORESTRY AND LOCtGING. 



INTRODUCTION. 



The terms in forestry which form a part of this bulletin comprise 

 the English forest terminology used in this countr}^ and the more 

 important German and French equivalents. Many entirely new terms, 

 and modifications of terms already in use, are included to meet the 

 specific needs of American forestr}^ The Bureau of Forestry will 

 follow this terminology closely in all branches of its work, and it is 

 hoped that foresters generally in the United States will still further 

 standardize it by use. 



The terms in logging comprise those commonly employed in work 

 in the woods. Words and phrases which are merely slang, those 

 whose use is so limited as to be of no practical importance, and those 

 of wide application which are in standard dictionaries, have been 

 omitted. . No terms used in the mill or to describe its product, or relat- 

 ing to tie making, turpentining, the production of maple sugar, and 

 other industries which are not essentially a part of the lumberman's 

 work, are included. A list of such terms is now in preparation and 

 will appear in another edition of this bulletin. 



Suggestions for the correction or enlargement of the present list 

 are invited, and ma}^ be sent to the Forester. 



TERMS I]Sr FORESTRY. 



[Terms recominended for use are defined. Terms not recommended are inserted as synonyms.] 



Absolute forest land. Land fit only for forest growth. 



Syn. : absolute forest soil. G., Holzboden. F., sol forestier. 

 Absolute forest soil. See Absolute forest land. 

 Absolute form factor. See Form factor. 



Accident yield. Trees which are cut on account of accident, as, for example, dam- 

 age by wind, snow, insects, or fire. 



G., Vorgriffnutzung, Calami tiitsnutzung. F., Produits accidentels. 

 Accretion, n. Increase in diameter or height; distinguished from increment, increase 



in volume. 

 Accretion borer. An instrument for determining the growth in diameter of stand- 

 ing trees. It consists of a hollow auger, which, when bored into a tree, extracts a 

 section showing the annual rings. 



Syn.: increment borer, increment gauge. G., Zuwachsbohrer. F., sonde de 

 Pressler. 



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