22 



Technology. 



Statistics. 



Die Harte des Holzes. (The hardness of wood) ; G. Janka. 1906. 



32 p. Illus. (W. Frick, Wien.) 

 Instructions to engineers of timber tests ; W. K. Hatt. 1906. 55 p. 



Illus. ' (Forest Service circular 38.) 



Consumption of tan bark in 1905 ; H. M. Hale. 1906. 4 p. (Forest 

 Service circular 42.) 



Cross-ties purchased by the steam railroads of the United States In 

 1905 ; H. M. Hale. 1906. 6 p. (Forest Service circular 43.) 



Wood used for pulp in 1905 ; H. M. Hale. 1906. 11 p. (Forest 

 Service circular 44.) 



Wood used for distillation in 1905; H. M. Hale. 1906. 3 p. (For- 

 est Service circular 50.) 



Wood used for veneer in 1905 ; H. M. Hate. 1906. 4 p. (Forest 

 Service circular 51.) 



Forest Laws. 



Les restrictions le"gales au droit de proprie'te' forestiere prive"e en France, 

 en Allemagne, en Autriche-Hongrie et en Suisse. (The legal re- 

 strictions on the rights of private forestry in France, Germany, 

 Austria-Hungary, and Switzerland) ; J. Madelin. 1905. 227 p. 

 (A. Rousseau, Paris.) 



Maryland forest-fire laws and forest protection. 1906. 2 p. (Mary- 

 land state board of forestry, Baltimore. Forestry leaflet No. 2.) 



Forest laws of Maryland. 1906. 3 p. (Maryland state board of for- 

 estry, Baltimore. Forestry leaflet No. 3.) 

 Proceedings of Associations. 



Internationaler Verband der forstlichen Versuchsanstalten. Zeit-Eintei- 

 lung, 5. Versammlung, 8-16. Sept., 1906, in Wurttemberg. (In- 

 ternational association of forest experiment stations. Program, 

 5th meeting, Sept. 8-16, 1906, at Wurttemberg.) 3 p. 

 Forest Enemies. 

 Forest Insects. 



The brown-tail moth and how to control it; 

 22 p. Illus. (U. S. Dept. of Agriculture. 

 Diseases of Trees. 



Tree root rot (Armillaria mellea). 1906. 3 p. 



L. O. Howard. 1906. 

 Farmers' bulletin 264.) 



Illus. (Great Brit- 



ain Board of agriculture and fisheries. Leaflet 174.) 



Fires. 



Hail. 



Forest fires ; A. Akerman. 1906. 24 p. 

 est service, Boston. Bulletin 5.) 



(Massachusetts State for- 



Irrigation. 



Die Hagelbeschadigungen in Wurttemberg wahrend der 60 Jahre 1828- 

 1887. (Damage done by hail in Wurttemberg from 1828 to 1887) ; 

 A. Biihler. 1890. 200 p. (W. Kohlhammer, Stuttgart.) Con- 

 tents of interest. Chap. 5. Die Einfluss der Bedwaldung auf die 

 Hagelhauflgkeit. (The influence of forests on the frequency of hail 

 storms. ) 



Investigations of irrigation practise in Oregon ; A. P. Stover. 1906. 

 30 p. (TJ. S. Dept. of Agriculture Office of Experiment Stations. 

 Circular 67.) 



FOREST EXTENSION. 



Watershed Studies. 



Reports on watershed studies in the Elkhorn and Helena reserves have been 

 received from J. F. Bond. He finds that forest planting will not be advisable 

 to benefit city watersheds in either reserve, since they are fairly well forested, 

 and such small areas as occur are unimportant or are unfavorable for planting. 

 He recommends, however, that intensive fire protection be given, that grazing 



