1000 ANNUAL REPORT OF THE Off. Doc. 



Average draft. 



Narrow tires, 427 pounds. 



Broad tires, 263.3 



Difference in favor of broad tires, 159.5 " 



Percentage difference, 59 



(e) Corn land dry enough to plow. Surface covered with dead 

 grass and stalks. Almost level. Length of run, 400 feet. Trial 

 made March 27, 1896. 



Average draft. 



Narrow tires, 422.7 pounds. 



Broad tires, 361.9 



Difference in favor of broad tires, 60.8 " 



Percentage difference 16.8 



(f) Corn land, dry, firm, level, and smooth. Reasonably free from 

 weeds. Trial made September 12, 1896. 



Average draft. 



Narrow tires, 343.1 pounds. 



Broad tires, 225.4 



Difference in favor of broad tire, 117.7 " 



Percentage difference, 52.2 



(g) Corn stubble in the fall. Land dry and reasonably firm. 

 Broad tires made rut 1 to 2.5 inches deep. Narrow tires rriade rut 

 2 to 5.5 inches deep. Length of run, 400 feet. Trial made October 

 13, 1896. 



Average draft. 



Narrow tires, 472.9 pounds. 



Broad tires, 285.6 " 



Difference in favor of broad tires, 187.3 " 



Percentage difference, 65.5 



(h) Corn stubble, nearly dry enough to plow and almost free from 

 weeds and trash. Ruts made by narrow tires 5.6 inches deep; ruts 

 made by broad tires, 1.45 inches deep; Length of run, 400 feet. 

 Trial made March 20, 1897. 



Average draft. 



Narrow tires, 878.4 pounds. 



Broad tires, 509 .9 " 



Difference in favor of broad tires, 368.5 " 



Percentage ditference, 72.2 



Eight separate trials were made on stubble land, embracing wet, 

 medium and dry conditions. These trials included both wheat and 

 corn stubble land. The results in every case are strikingly favor- 

 able to the broad tire. The difference varies from 16.8 to 72 per cent. 

 The average difference for all the trials is 186.2 pounds, or 48.5 per 

 cent. With the same effort, therefore, required to haul a ton over 



