LOGGING AND LUMBERING 537 



Swalwell, W. H. (10659) 



observations on log marking. Timberman 27 (3) : 198, 200. 1926. 



Wagener, W. W. (10660) 



breakage loss in logging. Jour. Forestry 26 : 639-648. 1928. 



POWER LOGGING 



Ayres, R. W. (10661) 



caterpillar tractors in the logging woods. Amer. Forests and Forest 

 Life 32 : 672-675. 1926. 



Barker, S. W. (10662) 



motor truck logging in western Washington. Timberman 20 (12) : 5CM51, 

 illus. 1919. 



Barry, E. J. (10863) 



application of electricity in the woods ; economy and efficiency of this 

 power as applied to logging operations. Lumber World Rev. 25 (4) : 

 27-28. 1913. 



(10664) 



ELECTRICAL ENERGY MUST BE AMPLE IN LOGGING OPERATIONS TO BE SUCCESSFUL. 



Timberman 12 (9) : 53. 1911. 



■ (10665) 



electricity in logging operations. Timberman 15 (11) : 61-62. 1914. 



(10666) 



logging by electricity. Miss. Valley Lumberman 44 (40) : 40-41. 1913. 



(10667) 



past year witnesses first electrical logging. Pacific Lumber Trade Jour. 



17 (9: 113, illus. 1912. 



(10868) 



UTILIZATION OF ELECTRICITY IN THE LUMBER INDUSTRY ON THE PACIFIC COAST. 



Timberman 13 (9) : 34-35, illus. 1912. 



Berger, K. (10669) 



skyline methods used for logging. West Coast Lumberman 50 (596) : 38, 

 42, 50, illus. 1926. 



Berry, Swift. (10670) 



summary of study of high lead logging in California pine. Amer. Lum- 

 berman 2556 : 50-50A. 1924. 



Bloom, Andrew. (10671) 



advantages of electric logging apparatus. Timberman 15 (11) : 67-68, 

 illus. 1914. 



Brown, G. L. (10872) 



electricity as a factor in logging. Pacific Coast Wood and Iron 52 (3) : 

 16A. 1909. 



Brown, N. C. (10673) 



the use of tractors in logging. Empire State Forest Prod. Assoc. Bull. 12 : 

 22-26. 1921. 



Brown, Simmons. (10674) 



mechanical log haulers and their development. Berlin Mills Co. Ann. 

 Conf . Woods Dept. 3 : 22-26, illus. 1915. 



Buckingham, J. E. (10675) 



gasoline locomotives for logging service. Timberman 19 (1) : 42-44, illus. 

 1917. 



California Forestry Committee. (10676) 



high lead logging in California. Timberman 25 (5) : 64-69. 1924. 



Carloni, Prelidiano. (10677) 



how aerial logging is done in italy. Lumber World Rev. 49 (9) : 93-99, 

 illus. 1925. 



Clark, E. T. (10678) 



solving the spar tree problem. West Coast Lumberman 37 (436) : 22-23, 

 38, illus. 1919. 



