Iteport on the Trials of Implements at IVoh-erhamjdon. 525 
slo\\ly. la sujiport of tliis, tlio foUowiiif^ extract from the tables iiitiy be 
taken 
Indicut'jd WvrJc of Eii(jine in ft.-lh^. 2>cr Ih. of Earth moreJ. 
Foot-lbs. , 
Amies and Pjarford — fulI-spccd 12'(j 
,, „ lialf-speed 12'8 
Ikirrows and Stewart — ruU-specd ir4 
„ „ hair-s[)eed 12'3 
; „ ,, fidl-specd :0-0 
Lalf-specd <S-8 
llaveiistliorpe (Jum[)an3' — fuU-s[)ccd 'IVO 
„ ,, lialf-speed .. .. l2'') 
,, ,, oiiu-thinl s[iccd ,. I'.yo 
In throe cases the slower speed took tlie more power, and in two only 
rather less. 
The Fisken high-speed hemp rope naturally attracted a good deal of atten- 
tion. The work expended per acre by the various roundabout systems stands 
in the following order : — 
Foot-lbs. 
The Fisken high-speed system 22"1 
jMessrs. J. Fowler and Co 20-4 
Messrs. Howard l(i"7 
IVTessrs. Amies and Barford 12'7 
Messrs. Barrows and Stewart , ITu 
The Fisken tackle worked Fowler's imjjlements, and these undoubtedly 
moved the ground in a more thorousih manner than any of the others; hence 
the greater power absorbed by the first two competitors, but the 10 per cent, 
extra force required by the high-speed system over Fowler may be fairly laid 
to the charge of the hemp rope. The figures above quoted also show that, in 
order to obtain a fair comparison between different systems of tackle, they 
should all be worked with the same implement under similar conditions of 
soil, in order to ascertain the useless resistance inherent in each. The abov<! 
Averages for roundabout tackle are taken from trials at both Barnhurst and 
iStaflbrd. To approximate nearer to similar conditious, the averages from 
trials of diggers only at Stafford, worked by various systems, have beeu 
extracted, and it appears that the 
Average foot-lbs. of work per lb. earth moved by 
Fowler's various systems of tackle = 21"8 
Average foot-lbs. of work per lb. earth moved by 
Howard's various systeujs = 21"8 
Average foot-lbs. of work per lb. earth moved by 
Kavensthorpe (Fisken) tackle = 22'9 
Thus giving 5 per cent, advantage to the tackle of the first-named firms. 
Comparing the resistance of ploughs, diggers, and cultivators resjiectively 
on light and heavy land, it is found on taking averages from all the trials 
that the 
At Barnhurst. At Stafford. 
Average foot-lbs. of work indicated per lb.) _ -j^-.y 2]^. 7 
of earth dug or ploughed \~ "" 
Average foot-lbs. of work iudicalcd per lb. i _ j^.^ '>Q-Z 
of earth cultivated j~ '■" 
thus showing that the change from light to heavy land increased the resist- 
ance 28 per cent., and that the diggers and ploughs consumed about 10 per 
cent, more power than the average of cultivators exhibited. It further 
