344 EXPERIMENT STATION RECORD. 



highest for the cedar and lowest for the spruce, the pine representing an 

 average for the 3 six^cies. 



Tyloses: Their occurrence and practical significance in some American 

 woods, Eloise Gerry (U. S. Dcpt. Agr., Jour. Agr. Research, 1 {1914), -Vo. 6, pp. 

 4Jio--'pO, pis. 8). — The author briefly discusses the causes leading to the forma- 

 tion of tyloses and their function in the living plant, and reports a study of 

 the occurrence and significance of tyloses in wood from trees of commercial 

 size grown in the United States, 139 species having been examined. A bibliog- 

 raphy of cited literature is included. 



Tyloses were found in the sapwood of all the species where their presence 

 was established in the heartwood. Well-developed tj^loses were found in the 

 outermost rings near the bark in 30 species of hardwoods. True tyloses were 

 found to occur in the wood tracheids in certain pines, principally in the white 

 pine group. Epithelial cells were found sometimes to effect a partial or even 

 a complete tylose-like closing of the resin canals in Pinus, Larix, Picea, and 

 Pseudotsuga. Tj'loses are said to act like a natural filler in hardwoods, and 

 woods where they occur abundantly are as a rule very durable. They reduce 

 the penetrance of woods because they are impermeable to air, water, and 

 creosote, thus decreasing, for instance, the tendency for woods to become 

 water-logged. The closing of the vessels of hardwood by tyloses does not pre- 

 vent the penetrance of preservatives, such as creosote, into the other wood 

 elements. 



Tyloses: A study of their occurrence and practical significance in some 

 American woods, Eloise Geery {Abs. in Science,, n. ser., 39' (1914), No. 998, 

 p^ 262). — The more imiwrtant results secured in the investigations noted above 

 are here summarized. 



The selection system in forest economy, A. Kubelka (Internat. Inst. Agr. 

 [Rome], Mo. Bui. Agr. Intel, and Plant Diseases, Jf {1913), No. 11, pp. 1688- 

 1695).— X discussion of the advantages and disadvantages of the selection forest 

 as compared with even-aged stands grown under open conditions. 



The present conditions of forestry in Italy, L. Piccioli {Internat. Inst. Agi\ 

 {Rome'], Mo. Bui. Agr. Intel, and Plant Diseases, 4 {1913), No. 11, pp. 1682-^ 

 1688). — The author here briefly reviews the evolution of forest laws in Italy in 

 order to give an idea of the present forest conditions and the difficulties which 

 are encountered in framing a single code of forest legislation without prejudice 

 to the interests and customs of the population. 



A bibliography of recent literature on the subject is appended. 

 Progress report of forest administration in Baluchistan for 1913—13, 

 MULRAJ {Rpt. Forest Admin. Baluchistan, 1912-13, pp. 5+28).— A progress re- 

 port of the administration of the state forests in Baluchistan, including a finan- 

 cial statement for the year ended June 30, 1913. The important data relative 

 to forest areas, forest surveys, working plans, revenues and expenditures, etc., 

 are appended in tabular form. 



The lumber industry. — I, Standing timber {U. S. Dept. Com. and Labor, 

 Rpt. Comr. Corporations on Lumber Indus., pt. 1 {1913), pp. XXIII+301, pis. 

 2). — This comprises the first part of a statistical survey of the lumber industry 

 of the United States which was undertaken by the Bureau of Corporations of 

 the Department of Commerce and Labor in response to certain resolutions of 

 Congress which called, in substance, for information on the causes of the high 

 prices of lumber and whether or not these high prices have resulted from any 

 contract, agreement, or combination in restraint of commerce. The present 

 part discusses the importance of the lumber industry, the scope of the report 

 and special principles in^'olved, methods followed in the investigation, and 

 the investigation area. The succeeding chapters deal with the supply of stand- 



