INCLINES 303 



attained both empty and loaded was approximately 4 miles per 

 hour. 



The cost of operation was 30 cents per thousand feet, log scale, 

 for labor and skid oil, and 20 cents per thousand feet for cable, 

 making a total cost of 50 cents exclusive of the value of equip- 

 ment. 



Machines of a somewhat different type but operating on the 

 same general principle are made for hauling log cars. The track 

 is made standard-gauge and the gypsy wheel is placed in the 

 center of the frame, and the cable midway between the rails. 



BIBLIOGRAPHICAL NOTE TO CHAPTER XIX 



Clark, A. W.: Overcoming Grades too Steep for Geared Locomotives. The 



Timberman, Portland, Oregon, x\ugust, 1909, p. 34. 

 MacLafferty, T. H.: Handling Logging Trains on Excessive Grades. The 



Timberman, July, 191 1, p. 44. 

 Nestos, R. R.: Aerial Snubbing Device. The Timberman, August, 191 2, 



p. 49- 

 Potter, E. O.: UtiHzation of the Cable Locomotive. The Timberman, 



August, 1909, p. 34. 

 Wentworth, G. K.: Lowering Logs on a 3200-foot Incline. The Timberman, 



.\ugust, 1909, p. 34. 

 Williams, Asa S.: Logging by Steam. Forestry Quarterly, Vol. VT, pp. 19-21. 



