TRESTLE BUILT OF TIMBER CUT AND SAWED IN THE VICINITY ON LINE OF GREAT NORTHERN RAILWAY, FLATHEAD. 



MONTANA. 



FOR TRESTLES AND BRIDGES WOOD HAS BEEN SUPERSEDED BY STEEL, CONCRETE, AND MASONRY. YET IN PIONEER CON- 

 STRUCTION THROUGH TIMBERED COUNTRY THE WOODEN TRESTLE STILL HOLDS ITS OWN. 



