BUREAU OF FORESTRY. Ill 



tioii of the Big Trees of California was begun and is still in progress, 

 and a preliminary study of the swamp forests of eastern Missouri and 

 Arkansas was undertaken. 



Studies of North American forests. — The forests of Nebraska were 

 made the subject of an elaborate report, and at the request of the 

 Michigan forest commission an investigation of lands in the southern 

 peninsula of Michigan was made, with special reference to the proper 

 management of the Michigan Forest Reserve. Special studies of 

 forest conditions were pushed forward in Kentucky, Ohio, and Texas, 

 and of the distribution of forests in certain portions of New Mexico, 

 Arizona, South Dakota, Wyoming, Montana, and California. In Cali- 

 fornia the study of the relation of forest cover to the flow of streams 

 was continued, and the results will shortly be ready for publication. 

 In cooperation with the U. S. Geological Survey the study of the 

 Sierra Forest Reserve was completed. In Vermont a cooperative 

 study of the forest resources and conditions of the State was com- 

 pleted, and in Maryland the mapping of the forests by counties, begun 

 in 1899, was continued. Attention was given, both in the office and in 

 the field, to the region of the proposed Appalachian Forest Reserve. 



Fires and grazing. — Investigations of the effect of grazing on the 

 forest were conducted in Washington, Oregon, Wyoming, New Mex- 

 ico, Utah, and California. The study of forest fires was conducted 

 in 12 States, and work was pushed on the preparation of a report. 



Dendro-chemical investigations. — Special attention has been given 

 during the year to the chemical investigation of tan extracts from 

 native woods and barks, and of gums from the Philippine Islands. 

 The study of pulp woods, with special reference to the qualifications 

 of untried sj^ecies, has been carried forward. 



Turpentine orcharding. — The investigation conducted by the Bureau 

 into the methods of producing naval stores in the Southeastern United 

 States has resulted in the development of a method which it is believed 

 will radically affect the whole industry. A report is in preparation 

 describing its actual operation. 



Forest entomology. — In cooperation with the Division of Entomology, 

 a beginning was made in the investigation of insect damage to the 

 forest, with the direct purpose of devising remedies. The vast impor- 

 tance of the subject makes the continuance of this work imperative. 



Various studies. — Investigations of the lumber industry of the State 

 of New York and the maple sugar industry of the United States were 

 completed, and a study of the osier willow industry was begun. 



A careful investigation of the Eucalypts and Acacias cultivated in 

 the United States was completed, and bulletins were prepared for 

 each. 



Timber construction and supplies. — In cooperation with the Bureau 

 of Plant Iudustr3% great progress was made during the year in arous- 

 ing the interest of mining and railroad companies in the preservation 

 of timbers and in the sources of timber supply. The practical assist- 

 ance of many railroads toward the establishment of conservative 

 forestry was begun, and the work shows conspicuous promise. 



Forest exhibit. — A forest exhibit was prepared and installed at the 

 Pan-American Exposition at Buffalo, and later transferred to Charles- 

 ton, S. C. 



