392 



ILLINOIS STATE ACADEMY OF SCIENCE" 



COTTONWOOD. 



Percent 



Number Percent Other 



Process of Ties Removed Decay Causes 



Creosote 88 3 1.1 2.3 



Card 296 , 54 2.7 15.5 



Burnettizing 56 56 96.5 3.5 



RED OAK. 



Creosote 164 4 2.4 



Card 777 111 .3 11.3 



Burnettizing 159 35 6.3 15.8 



Untreated 128 127 96.1 3.1 



POPLAR. 



Creosote 50 2 4.1 



Card 396 148 7.2 30.1 



Burnettizing 50 20 20. 20. 



Untreated 81 80 95 . 1 3.71 



WHITE OAK. 



Creosote 15 



Card 136 28 8.8 11.8 



Burnettizing 15 3 6.7 13.3 



Untreated 39 28 61 . 5 10.3 



Data furnished by F. S. Shinn, Supervisor of Galesburg Tie Plant, 



and J. H. Waterman, Supt. of Timber Preservation, C. B. & Q. R. R. 



