xii Contents. 



PAOtt. 



CONSTRUCTION OF STONE SILOS 397 



Laying walls, p. 397 ; Plastering, p. 398 ; Doors, p. 390. 



CONSTRUCTION OF BRICK SILOS 400 



Foundation, p. 400 ; Walls, p. 402 ; Tie-rods, p. 402 ; Making walls 

 air-tight, p. 402 ; Doors, p. 403. 



CONSTRUCTION OF BRICK-LINED SILOS 403 



Foundation and sill, p. 405 ; Setting studding, p. 405 ; Sheeting, 

 p. 405 ; Siding, p. 406 ; Lining, p. 406. 



LATHED AND PLASTERED SILOS 407 



CONSTRUCTION OF ALL WOOD SILOS 409 



Foundation, p. 409 ; Cementing bottom, p. 410 ; Sills and studding, 

 p. 410; Sheeting and siding, p. 412; Plate, p. 413; Lining, 

 p. 413; Roof, p. 417; Ventilation, p. 417; Painting lining, 

 p. 418. 



STAVK OR TANK SILO 418 



Construction, p. 420 ; Staves, p. 422 ; Foundation, p. 422 ; Hoops, 

 p. 422 ; Doors, p. 423. 



PIT SILOS ...:.... 423 



DIMENSION OF SILOS 421 



Weight of silage, p. 424; Capacity of silos, p. 424; Horizontal 



feeding area, p. 425. 

 DANGER IN FILLING SILOS 427 



FARM MECHANICS. 



CHAPTER XX. 

 PRINCIPLES OF DRAFT. 



How THE DRAFT INCREASES WITH THE GRADE 428 



Experimental demonstration of Influence of grade on draft, 429. 

 THE MECHANICAL PRINCIPLE INVOLVED IN THE RELATION OF DRAFT 



TO GRADE 430 



THE STEEPEST GRADE ADMISSIBLE 430 



GOOD ROADS MAKE HIGH GRADES MORE OBJECTIONABLE 433 



DRAFT OF WAGONS ON THE LEVEL 434 



The smoothness of the road-bed, p. 434 ; Rigidity of the road-bed, 

 p. 434 ; Draft of wagons shown by English trials, p. 436 ; 

 Draft with different widths of tire, p. 436 ; Size of the carriage 

 wheel, p. 437 ; Distribution of load on the carriage, p. 438 ; 

 Heaviest load on the hind wheels, p. 439 ; Direction of the line' 

 of draft, p. 440 ; Line of draft on road wagon, p. 441 ; Rigidity 

 of the carriage, p. 442 ; Results of Gen. Morin's experiments 

 In France, p. 443. 



CHAPTER XXI. 



CONSTRUCTION AND MAINTENANCE OF COUNTRY ROADS. 



ESTABLISHING THE GRADE 4'44 



FACTORS TO BE CONSIDERED IN ESTABLISHING THE GRADE.. . 444 



