1917] FORESTRY. 745 



existing conditions affecting the lumber industry, with special reference to 

 destructive competition ; presents data to justify forestry as a permanent busi- 

 ness proposition ; and emphasizes the importance of organized control, whether 

 by public or private agencies. Suggestions are given relative to methods of con- 

 trolling the lumber industry. 



Farm woodlot timber: Its uses and principal markets, G. N. Lamb (Purdue 

 Univ. Dept. Agr. Ext. Bui. 51 (1916), pp. 24, ftffs. 2). — An account of the native 

 commercial species, their uses, specifications, marljet prices, and important 

 marliets for woodlot products. The subject matter is based on a study of 

 Indiana woodlots conducted by the Forest Service of the U. S. Department of 

 Agriculture in cooperation with the Department of Agricultural Extension of 

 Purdue University. 



Trees planted by new machine replace railway snow fences, H. Smith 

 (Engin. News, 77 (1917), No. 11, pp. 432, 43S, figs. 4).— Planting plans used in 

 forming wlndbrealis in place of snow fences along the Minneapolis, St. Paul, 

 and Sault Ste. Marie Railway are given. A tree-planting machine successfully 

 used in this worli is illustrated and described. 



The Christmas tree industry, E. Secrest (ilo. Bui. Ohio Sta., 1 (1916), No. 

 12, pp. 371-374, fig. 1). — Popular suggestions are given relative to the planting, 

 care, and marketing of Christmas trees. 



The greenheart of commerce, C. D. Mell (Amer. Forestry, 22 (1916), No. 

 269, pp. 288-291, figs. 6). — A popular account of the greenheart tree (Nectandra 

 rodicEi), of the Gulanas and Venezuela, relative to its distinguishing charac- 

 teristics, exploitation, mechanical properties, and commercial importance. 



True mahogany, O. D. Mell (V. S. Dept. Agr. Bui. 474 (1917), pp. 24, pis. 

 3, figs. 4)- — An account of the true mahogany (Swietenia spp.) with reference 

 to its common names, geographical distribution, general cliaracteristics of the 

 wood, characteristics of the wood from different regions, market value, uses 

 and supply. Importations to the United States, methods of logging and trans- 

 portation, botanical characteristics, and minute characters of the wood. The 

 author concludes with a list of cabinet woods from various countries which 

 resemble true mahogany in one or more characters and are frequently mar- 

 keted as mahogany. 



Contribution to the knowledge of red quebracho, J. B. Galarza (Trah. 

 Inst. Bot. y Farmacol., Buenos Aires, No. 32 (1915), pp. 69, pis. 2, figs. 31). — 

 An account of the red quebracho (Schinopsis spp.), with reference to its 

 botany, histology, geographic distribution, exploitation of lumber and tannin 

 extract, physical and chemical properties, commerce, and uses. Data on 

 mechanical tests of the wood are given and the strength values compared with 

 various other Argentine woods. Analytical data are also given showing the 

 tannin content of numerous samples. 



A bibliography of cited literature is appended. 



Lumbering in the sugar and yellow pine region of California, S. Bebey 

 (f7. S. Dept. Agr. Bxd. 44O (1917), pp. 99, pis. 14, fig. i).— The introductory 

 part of this bulletin gives a general account of the region, the forest, types of 

 operations, labor, camps, and factors affecting the cut. Part 2 treats in detail 

 of logging operations, including the preparing of logs for transport, the various 

 stages of transportation, and woods supervision. Part 3 discusses the manu- 

 facture of lumber, and part 4 deals with general cost factors, consideration 

 being given to overhead charges, depreciation, and the costs of typical opera- 

 tions. 



An annotated list of the forest trees of the Hawaiian archipelago, V. 

 MacCaughey (Bui. Torrey Bot. Club, 44 (1917), No. 3, pp. 145-157).— A check 

 list to the Hawaiian arborescent flora. 



