FORESTRY. 241 



Industrial materials: The woods, edited by P. Keais (Getcerbliche Mate- 

 rialkunde: Die Hdlzcr. Stuttgart, 1910, vol. 1, pp. XVI+7S2, figs. 101).— This 

 is the first of a series of volumes to be issued on industrial materials. 



The present volume is a handbook of information on wood as a material. 

 The subject matter was prepared by 21 authors and deals with the various 

 woods from the standpoints of forestry, botany, trade, commerce, statistics, 

 freight, and shipping; wood testing; the detection and correction of diseases 

 and defects; wood coloring, embellishing, preservation, and working; and the 

 application of woods to various purposes. 



Wood-pulp testing at the forestry court cellulose laboratory, United 

 Provinces Exhibition, W. Raitt (Indian Forester, 37 {1911), No. 1-2, pp. 30- 

 34)- — Methods of determining the paper-making value of inferior woods of the 

 United Provinces are described and a list is given of those woods which have 

 yielded at least 40 per cent of bleachable pulp with a soda consumption of not 

 more than 20 per cent. 



Oxidizing" enzyms and their relation to sap stain in lumber, I. W. Bailey 

 (Bot. Gaz., .lO (WW) No. 2. pp. l-',2-l',l ; nhs. in Chem. Abs.. .5 (1911), No. 5, 

 p. 897). — This work shows that sap stain in lumber is brought about by fungi 

 and by chemical oxidation induced by the enzyms. It could be prevented in 

 alder, birch, and cherry woods by treating the sapwood with boiling water. 



Forest fires: Causes, losses, remedies (Bui. Soc. Cent. Forest. Belg., IS 

 (1911), Nos. 3, pp. 153-167; .'/, pp. 229-2-',0).— This is a report to the Belgian 

 minister of agriculture of an investigation conducted by a special commission 

 of the Superior Council of Forests, relative to the causes and losses from forest 

 fires. Kecommendations for the control of forest fires are presented. 



Timber estimating", A. F. Hawes (Ann. lipt. Comr. Agr. Vt., 2 (1910), pp. 

 191-204). — Methods of estimating which can be applied by persons with little 

 experience are described, volume tables for a number of Important timber species 

 in Vermont being appended. 



The capital value of Wiirtemberg state forests, Schickhaedt (Allg. Forst 

 u. Jagd Ztg., 87 (1911), Apr., pp. 118-126). — This is a discussion of methods for 

 determining the capital value. 



Contribution to the knowledge of the dynamic occurrences in the moving 

 of tiinber on a timber slide, F. Angerholzeb von Almburg (Centbl. Oesam. 

 Forst w., 37 (1911), No. J,, pp. 161-179, figs. 16). — The author here elaborates a 

 modification of the law of inclined planes with special application to the mo- 

 tion of timber in timber slides, including such phases as rate of fall, rapidity, 

 friction, and curve radius. 



Forest railways for the extraction of timber in Burma, F. A. Leete (Indian 

 Forester, 37 (1911), No. 1-2, pp. 3.'f-5.'i. pis. 2). — A self-balancing monorail sys- 

 tem used in the transportation of logs is described. 



Preliminary study of forest conditions in Tennessee, R. C. Hall (Tenn. 

 Geol. Survey Bui. 10, Extract A, 1910, pp. 56, pis. 13, maps 2). — The results are 

 given of a preliminary study conducted by the Forest Service of this Depart- 

 ment in cooperation with the Tennessee State Geoloigical Survey. The general 

 condition of the forests, the various timber industries, and the forest regions 

 are described, a number of special forest problems are discussed, and a forest 

 policy for the State is recommended. A list of trees native to Tennessee, to- 

 gether with growth tables of white and chestnut oaks, is appended. 



It is estimated that about 35 per cent of the total area of the State is in 

 forests, and that a large part of this land is best suited for growing timber. 

 The preservation of the forest, especially on steep slopes, the establishment 

 of a fire protective system, the creation of state forests, and the employment 

 of a state forester are recommended. 



