LOGGING AND LUMBERING 573 



Ray, G. J. (11376) 



TIE ECONOMY AS PRACTICED ON THE LACKAWANNA. CrOSS Tie Bull. 8(8): 10-14. 



1927. 

 Robertson, W. H. (11377) 



ARGENTINE LAW REQUIRES HARDWOOD SLEEPERS. U. S. Daily Cons. Rept. 274 I 



723. 1917. 



Sackett, H. S, (11378) 



western larch for railway ties. Ry. Rev. 59 (12) I 368-369. 1916. 



Sohrenk, Hermann von. (11379) 



cross-tie forms and rail fastenings, with special reference to treated 



timbers. U. S. Dept. Agr., Bur. Forestry, Bull. 50, 70 pp., illus. 1904. 



(11380) 



cross ties in Europe. Natl. Assoc. Railroad Tie Prod. Proc. 8 : 44-48. 1926. 



(11381) 



mechanical wear of cross ties ; STUDY OF destruction of wood fiber under 



rails or tie plates. Cross Tie Bull. 9 (7) : 1-2, 4, 6, 8, 10, 12, 14, illus. 

 1928. 



(11382) 



mechanical wear of ties. (Abstract) Wood Preserving News 6 (10) : 135- 



136, 144-145, illus. 1928. 



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mechanical wear of ties. Ainer. Ry. Engin. Assoc. Bull. 30 (306) : 1-180, 



illus. 1928. 



Sheehan, F. C. (11384) 



NEW ENGLAND HARDWOODS FOR NEW HAVEN TIES- Cl'OSS Tie Bull. 9 (10) : 



16, 18, 20. 1928. 



Smith, Lowry. (11385) 



the theoretical effect of the use of treated cross-ties upon the annual 

 cross-tie requirements. Amer. Wood Preservers' Assoc. Proc. 16 : 178-182. 

 1920. 



Smith, W. J. (11386) 



supersensitive gum tie requires extra care. Cross Tie Bull. 9 (4) : 1, 

 16-18, illus. 1928. 



Stimson, Earl. (11387) 



future of the demand for orossties. Timberman 29 (9) : 170-172. 1928. 



(11388) 



the mechanical life of ties as affected by ballast. Amer. Wood Pre- 

 servers' Asso. Proc. 11 : 196-206, illus. 1915. 



(11389) 



tie requirements will decline. Wood Preserving News 6(5): 62-64, illus. 



1928. 



(11390) 



WHAT THE RAILROAD ENGINEER EXPECTS IN CROSS TIES. CrOSS Tie Bull. 6 (1) I 



6-18. 1925. 

 Teesdale, C. H., and Allen, S. W. (11391) 



APPARENT RELATION BETWEEN RAINFALL AND THE DURABILITY OF ZINC-TREATED 



cross ties. Amer. Wood Preservers' Asso. Proc. 15: 222-229. 1919. 

 Thorne, M. E. (11392) 



RELATION BETWEEN AVERAGE LIFE OF TIES AND PERCENTAGE OF RENEWALS. Amer. 



Wood Preservers' Assoc. Proc. 14: 150-156. 1918. 



United States Railroad Administration. (11393) 



specifications for CROSS ties. Jour. Forestry 16 : 837-839. 1918. 



Upson, A. T. (11394) 



shrinkage of ties in seasoning. Cross Tie Bull. 3(4): 1-13. 1922. 



Van Metre, R. (11395) 



woods suitable for cross ties. Amer. Wood Preservers' Assoc. Proc. 12 : 

 106-108. 1916. 



