G8G Report OR the Trials of Implements at Beilford. 



better tlian compare W. Ball and Son's waggon without springs, 

 No. 1306, in Class XX., with their waggon on springs. No. 1307, 

 in Class XXI., as they were both tested with the same weight of 

 roots. 



A larger proportion of the total weight rests on the hind 

 wheels of the latter, which are, however, of less diameter ; 

 therefore these two points would nearly counterbalance them- 

 selves. The angle of inclination of the wheels is less in No. 1307, 

 which will have some effect in reducing the draught ; but 

 we find, in looking at the respective mean draught per ton of 

 gross load on the road, that there is a difference of 16*2 lbs. 

 in favour of the waggon with springs ; and if we assumed an 

 allowance of 5 or 6 lbs. for difference of draught caused by 

 the smaller inclination of the wheels of No. 1307, we should 

 still have 10 lbs. of draught in favour of springs : this dif- 

 ference is also noticeable in the mean dravxght per ton of gross 

 load on arable land, although in a much less degree. The reason 

 of this is that, when a load is supported on springs, the con- 

 tinual shocks caused by resistances on the road are received by 

 the springs instead of being communicated to the whole load, 

 thus enabling the load to be moved along more steadily. This 

 would lead to the inference that the more elastic the springs, the 

 less will be the draught, and we shall see this very well illustrated 

 in the comparison of Hayes and Son's waggon on springs No. 

 1432, with VV. Ball and Son's No. 1307, in the preceding Table. 



The deflections of the springs, when the waggons were each 

 loaded with 45 cwts. roots, are given in the first Table on p. 687. 



Thus we see that the deflection in the front springs is about 

 equal, while on the hind springs there is a difference of 

 2-|- inches, Hayes's springs showing the least amount of. de- 

 flection. The proportion of the total weight resting on the 

 hind springs was however less in No. 1432 than in the other 



