FORESTRY. 1041 



Report on forest statistics of Alsace-Lorraine (Beitr. Forstfttntin. El.<<nss- 

 Lot/irin(j('n, J!Ki!). .\<i. JCi. pit. Li't). — This wdik consists of a statistical account 

 of forest areas, products, revenues, expenditures, etc., for the year 1(307, 

 together with a comparative sunuiiary for each year since 1870. 



The timber industry in north Germany, J. Marchkt (Dcr Jlolzhnndel Nord- 

 dcutsjhhtnd><. jAipsic and \'iinna, IDOS, pp. VII-\-227, figs. 19, maps 2). — A 

 study of the timber industry in various sections of north Germany, with con- 

 siderable data on production, commerce, prices, etc. 



Researches on the woods of different species of African leguminous trees, 

 E. I'ERROT and (.}. Gerard ( Vcg. Utiles Afn<n(c Trap. Fnnir., J!)01\ No. ,i, pp. 155, 

 pis. 10, figs. 2'i). — This work, which consists of a botanical, scientific, and 

 economic study of different species of African leguminous trees, was undertaken 

 with the view of estaljlisliins scientific characters for the identitication of the 

 different species b.v an examination of the woods. The microscopic study of 

 these woods was the important feature of the investigation. 



In part 1 consideration is given to the anatomy of the ligneous tissue in its 

 relation to the diagnosis of wood. In part 2 the individual species are con- 

 sidered relative to their botany, wood structure and composition, and economic 

 value. In part .'{ the author compares and discusses the ;ni])ortant facts brouglit 

 out in the studies. 



An extensive bibliography on the study of woods Is given and a series of 

 schedules are appended showing the important data obtained by the micro- 

 scopical examination of each species. 



A Philippine substitute for lignum- vitae, W. I. Hutchinson ([PhUippine] 

 Bur. Forestry Bui. 9, pp. 3-8). — In view of the rapidly decreasing supply of 

 lignum-vit;e (Guajneuin nffiehiale) of the West Indies, the Philippine Bureau 

 of Forestry conducted an investigation for the purpose of finding a wood capa- 

 ble of repliiciug it. As a result of this work, mancono {Xnntliostenion rerdu- 

 goniniius), the hardest and heaviest of Philii)i)ine woods, is recommended as 

 having enough good qualifies to serve as a substitute for lignum-vifje. It is 

 urged that the wood be tried by all hardwood manufacturers, since the species 

 is found in merchantable sizes and quantity and can be cheaply exploited. 



The two species are described and compared, and the mancono is discussed 

 relative to its distribution and occurrence, logging operations, cost of labor 

 and transportation. One official test of this wood was made by the U. 8. 

 Naval Station at Cavite. in whicli it was installed in a launch as a bearing for 

 journals rotating in salt wafer, and was found to be but little worn at the end 

 of 7 months. It is considered to be the e<pial of lignnm-vifa; when both woods 

 are used for bearings on side grain. 



Physiological principles involved in the tapping of rubber trees; based on 

 experiments conducted with Hevea brasiliensis, II. Fitting {Tropenpflniizer. 

 Hcihcfte, 10 {1909), No. I, pp. '/-/?). — The author reports on a physiological 

 investigation of various methods of tapping rubber trees, conducted in .lava. 

 A'arious ta[)ping methods were studied relative to their influence on the life of 

 the tree in general and niion tlu" snhsccpicnt formation of latex and rublter. and 

 the results of this sfud.v are comi»ared with the experience of practical rni)b(n' 

 growers. The author recommends and discusses the use of a somewhat modi- 

 fied herring-bone tapping system. 



On the plantation, cultivation, and curing of Para Indian rubber (Hevea 

 brasiliensis), II. A. Wickiiam ( f.ondon. I90S, pp. 7,S, plx. 7. figs. 5. iiiup I). — 

 This is a collection of notes on the above toi»ics based upon the author's experi- 

 ence in the tropical region of South .Vmerica. An account is also given of the 

 introduction of I'ara rubber from South America to the eastern tropics. 



