344 EXPERIMENT STATION RECORD. 



potiiifrntin) . and several species of the prickly ash (Xanthoxylnm). This 

 circular points out the distinguishing characteristics of genuine fustic wood 

 and of its principal substitutes in order that consumers may readily distinguish 

 the real from the spurious article. A full description of the microscopic 

 structure of fustic wood is presented as a guide for the detection of possible 

 new and at present unknown substitutes. 



Preservative treatment of poles, compiled by W. H. Kempler (17. S. Dept. 

 Agi:, Forest. Serv. Bui. S-'i, pp. J.5, 2)/.s. //. figs. 11). — This bulletin summarizes 

 the results ]nil)lishe<l in previous Forest Service circulars (E. S. R., 20, p. 48), 

 and presents additional data and information gained by the more recent in- 

 vestigations, especially those by O. T. Swan. 



The subject matter is discussed under the following general headings: 

 General principles of wood preservation; Forest Service investigations; resume 

 of projects; results of seasoning tests; brush method and open-tank process 

 of treating poles; advantages and limitations of the open-tank process; 

 results of treatments by species, including chestnut, southern and northern 

 white cedar, western red cedar ; western yellow, lodgepole, and loblolly pine, 

 and cypress; design and operation of pole treating plants; increased life 

 afforded by preservative treatment ; financial saving ; relation of preservative 

 treatments to pole specifications ; and growth and form of poles. The results 

 of the Investigations as a whole are summarized. 



The appendix contains a report on an inspection of experimental southern 

 white cedar and chestnut poles previously treated by the Forest Service in 

 cooperation with the Southern Bell Telephone and Telegraph Company (E. S. 

 R., 19, p. 243). In addition to a summary and discussion of the condition of 

 the poles under the various treatments, analyses are given of the preservatives 

 used. Detailed tables and curves showing the rate of seasoning of poles are 

 also appended. 



fourth, annual report on forest conditions in Ohio {Ohio Sta. Bui. 223, pp. 

 57-116, figs. 19). — This comprises a brief introductory report by C. E. Thorne 

 (pp. 57-59), a report of the consulting forester, by W. J. Green (pp. 60-62), in 

 which the station's policy in cooi^i-ating with public institutions and cities in 

 the study and testing of oriiamental trees, shrubs, and shade trees is outlined, 

 and a report of the forester, by E. Secrest (pp. 63-116). 



As noted in the report of the forester the chief lines of work in which the 

 station has been active during the year ended October 1, 1910, are as follows: 

 Cooperation with public institutions possessing land as to the management of 

 timber tracts and the establishment of experimental and demonstration plan- 

 tations ; cooperation with private owners in the improvement of the farm 

 woodlot and in various operations of reforestation ; and the establishment of 

 nurseries for experimental purposes and the distribution of forest-tree seed- 

 lings in connection with the various operations of cooperative work. The for- 

 est survey of the State was conducted as in previous years (E.. S. R. 23, p. 44), 

 10 additional counties being surveyed during the past season. The results 

 of the survey are summarized. Educational work was conducted through 

 various agencies. 



Among the chief destructive agencies of forests In Ohio particular attention 

 is called to the European pine blister rust {Peridermium strobi), which was 

 recently introduced from Germany (E. S. R., 21, p. (544), and has been found 

 occuring in 2 Ohio nurseries within the past year. 



Among the recommendations suggested for the improvement of forest con- 

 ditions in Ohio are a better system of lire protection, including a fire warden 

 service, the establishment of state forest reserves, the regulation of stream 

 flow, protection and jurisdiction of shade trees, and assistance in the establish- 



