. ox DIPLEMENTS SELECTED FOR TRIAL. 329 



The tlieoretical difference of draught between the up and down 

 trials, due to gravity, may be taken as follows : — 



Weight of plough, = 25 cwt. 

 Weight of man, = 1"1 ;> 



Weight of steel rope, = I'l „ 



27'2 cwt. 



0-.9 cwts. qrs. lbs. 



d^ = 272 x2 = 5 1 10^ 604 Ihs., the theoretical difference. 

 10 



We may therefore safely assume the average draught on level 

 ground, with an 8 J inch furrow in light soil, at 16 cwt. ; and 

 the correctness of this result deduced from trials on the sloping 

 field was confirmed by trials made subsequently on a field that 

 was nearly level. 



Horse Foiuer. 



In order to determine the horse-power, the following observa- 

 tion were made simultaneously with those above given for the 

 draught : — 



Uphill average velocity was 127?r ft. per minute, which ^ives 8*37 H.P. 

 Downhill average velocity was 175 ft. per minute, whicn gives 8-02 H.P. 



So that the average horse-power may be stated at 8*2. 



Drauglit of Tackle. 



The dynamometer having been placed so as to occupy the 

 position of the plough, it was found that the strain produced by 

 the carrying rope, 1000 yards in length, and the two windlasses, 

 was 2 cwt, the dynamometer moving at the rate of lol feet per 

 minute, and hence loss of power due to the Fisken mode of 



transmitting it = - '' ooT^no — = ^ ^^•■'^• 



Removals. 



From the descripjtion of the a])paratus given at page 2, it will 

 be seen that tlie proper arrangement of the corner anchors, 

 porters, &c., which is a feature peculiar to the Fisken tackle, is 

 not a work which can be done bv tlie ordiuarv run of larm- 

 servants without instruction. It is also an operation occupy- 

 ing some time, for which an allowance must be made in calcu- 

 lating; the cost of work done. The Committee bad onlv onfe 

 opportunity of ascertaining tlu' time taken to set up the tackld, 

 and it was found to be two liours, but this was under the direc- 

 tion of Mr Fi.sken's able assistants, and the Committee can hardly 

 arrive at any rcliahlc rcsvll from tlmt single trial. They have, 

 therefore, no alternative but to adopt Messrs Fi.'^kcn's estimate of 

 .the cost of " removals" at two shillings per day. 



