20 



The forest is mainly a pure stand of lodgepole pine substantially even-aged 

 but of various diameters. These rules do not apply to those portions of the 

 stand where old trees are standing in the midst of even-aged younger growth, 

 or where the condition of the forest makes scattered seed trees necessary. 



DENDROLOGY. 



Turpentining Before Lumbering. 



A number of lumber companies which have suffered heavy losses by windfall 

 of boxed trees and by reduction of grade thru deep chipping have abandoned 

 turpentining their pines before lumbering. The Kaul Lumber Company, of 

 Birmingham, Ala., among others, is looking earnestly to the possible application 

 of the improved method of chipping with which the Service has been recently 

 experimenting in Florida, and has applied to the Service for information and 

 advice. 



Forest Herbarium. 



The Service herbarium now includes specimens of most of the tree species 

 indigenous to the United States. In order, however, to make it complete and of 

 fullest use it is necessary to obtain specimens of the species still unrepresented, 

 as well as duplicate specimens of the represented species from different parts of 

 their range, so that as far as possible variant as well as typical characters may 

 be illustrated. 



The specimens on file have been gathered almost entirely by members of the 

 Service. A circular of instructions and requests to field members of the Service 

 is shortly to be issued as an aid to collecting specimens now lacking. 



Dead Wood and Seasoned Live Wood. 



A structural study of wood from " dead " trees has been undertaken for the 

 purpose of finding a practical means of distinguishing such wood from sea- 

 soned or partly dried wood from live trees. Consumers of pole and tie timber 

 are having difficulty in separating " dead " and " live " wood stock which is pur- 

 posely or otherwise made up of dead and live timber. Moreover, for many pur- 

 poses, the dead wood of some species is very inferior in durability and strength 

 to the wood of live trees. 



Tree Seed Germination and Seed Coverings. 



The special influence which the protective covering of tree fruits and seeds 

 have upon the germination of seeds is being carefully studied, microscopically 

 and otherwise, in order that better directions may be given in the storage and 

 planting of such seeds. Wide variation exists in the time and percentage of 

 germination of seeds of the same species, tho they have similar coverings. A 

 like variation exists between seeds of different species but with similar cover- 

 ings. Their behavior under the same storage conditions is also strikingly 

 variable, without apparent reason. It is expected that the investigation now 

 under way will throw light upon the many practical difficulties connected with 

 the handling and germination of tree seeds. 



