uo 



REPORT — 1902. 



Table I].— Effect of the Width of Tyres {load 1 ton). 



Description of the Surface 



Broken stone 

 Gravel roads.- 



)• !> 



It t) 



Resis ancc to 



Ti'action 



lb. ]>er ton 



Width of tfyres 



road. — Hard, smooth, no dust, no loose stones, 

 nearly level. 



-Hard find smooth, few loose stones, size of black 

 walnuts. 



Hard, no ruts, the large quantity of sand pre- 

 vented packing. 



New gravel, not compact, dry . , . .1 



Wet, loo.se sand, 1 " to 2|" deep . . . . I 



- Loam, dry, loose dust, 2" to 3'' deep . 



„ ,, hard, no dust, no ruts, nearly level . 



„ stiff mud, drying on top, spongy below . 



„ mud 2h" deep, very sticky, firm below 



Clay, sloppy mud, 3" to 4" deep, hard below 



„ dry on top but spongy below, narrow tyres - 

 cut in 6" to 8". 1 



,, dry on top but spongy below . . . : 



„ stiff, deep mud I 



-'limothy sod, dry, firm, smooth, narrow lyres 

 cut in 1". 



'I'iniothj- sod, moist, narrow tyres cut in .'i-i" 



Soft and spongy, grass and stubble 3" high ; 

 narrow tyres cut in 6". 



-Bluegrass sod, dry, firm, smooth .... 



„ ,, soft, narrow tyres cut in 3" . 



„ ,, narrow tyres cut in 4" . 



-Corn stubble, no weeds, nearly dry enough to 

 plough. 



„ „ Corn stubble, some weeds and stalks, dry enough 



to plough. 



„ ,, Corn stubble in autumn, dry and firm 



Ploughed land. — Freshly ploughed, but not harrowed, surface 

 rough. 



„ „ Freshly ploughed, harrowed, smooth and compact 



)i t» 



II II 



Mowing land. 



II »» 



II i» 



Pasture land. 



II II 



Stubble land. 



121 



182 



230 



330 

 246 



'JO 

 140 

 407 

 251 

 286 

 472 



618 



825 

 317 



421 

 569 



I 



6" 



98 

 134 



157 



260 

 254 

 106 

 109 

 307 

 325 

 406 

 422 



464 

 551 

 229 



305 

 327 



