12 INSECTS INJITBIv^oK, ^w ^^^,^^^^. 



PUBLICATIONS ON WOOD PRESERVATION AND STATISTICS ON 



POLES. 



1903. Von Schkenk, H. — Seasoning of timber. <Bul. 41, Forest Service, U. S. 

 Dept. Agr. 



1906. Grinnbll, H.— Prolonging the life of telephone poles. <Yearbook U. S. 



Dept. Agr. Jor 1905, Extract No. 395. 



1907. Crawford, C. G. — The open-tank method for the treatment of timber. 



<Cir. 101, Forest Service, U. S. Dept. Agr. 

 1907. Ceawpord, C. G. — Brush and tank pole treatments. <Cir. 104, Forest Serv- 

 ice, U. S. Dept. Agr. 



1907. Grinnell, H. — Seasoning of telephone and telegraph poles. <$Cir. 103, Forest 



Service, U. S. Dept. Agr. 



1908. Sherpesbe, W. F. — A primer of wood preservation. <Oir. 139, Forest Service, 



U. S. Dept. Agr. 



1908. Weiss, H. F. — Progress in chestnut pole preservation. <|Cir. 147, Forest 



Service, U. S. Dept. Agr. 



1909. Sheepesee, W. F. — Wood preservation in the United States. <Bul. 78, Forest 



Service, U. S. Dept. Agr., pp. 24, 25, Table I. 

 1909. Shbrpbsbb and Weiss. — Wood preservation. <Rep. Natl. Conserv. Com., 

 vol. 2, p. 663. 



1909. Kellogg, R. S.— The timber supply of the United States. <Cir. 166, Forest 



Service, U. S. Dept. Agr., pp. 20-21. 



1910. Willis, C. P. — The preservative treatment of farm timbers. <;Farmers' Bui. 



387, U. S. Dept. Agr. 



O 



