624 



Report to H.R.IL the President 



In a subsequent trial, however, made to test the strength of Llangennech 

 coal with Messrs. Shuttleworth's engine, it appears that both engines burnt 

 precisely the same amount of fuel ; and Mr. Carr has deduced from this 

 circumstance that, but for some accidental derangement in the slide, in 

 the main tabulated experiments the consumption of Messrs. Garrett's 

 engine, which was 11 '65 lbs. per horse-power, would not have been more 

 than Messrs. Shuttleworth's, or 8* 63 lbs. per horse-power. 



This mode of reasoning is, I think, liable to objection ; and I allude to 

 it with a view of preventing an undue importance being attached to it. 

 Besides, I do not entirely concur in the remarks made by Mr. Carr on the 

 construction of these two engines. 



Messrs. Garrett's fire-box is, in my opinion, decidedly inferior to Barrett, 

 Exall, and Co.'s ; and the workmanship generally is not superior. It is 

 lighter, and so far it is better ; but whether the smallness of the fire-box, 

 to avoid weight, may not entail other disadvantages, is a question on which 

 a doubt may fairly arise. 



As regards the engine of " Ransome and May," which, from some 

 accidental defect, did not go through a trial, I would beg to say, that in 

 point of workmanship, it is equal, if not superior, to any of the engines 



it could not be made to work. It was a trunk engine, which, in so small a power as 

 5-horse, would give rise to much extra friction. 



At the close of the trials, two engines, viz. Messrs. Garrett's and Messrs. Clayton's, 

 were put through a second trial, to test the difference in steam-generating power be- 

 tween the Llangennech coal used in these trials and the best Newcastle, when the 

 difference in favour of the former was found to be as 8*63 to 11 '3 lbs. of coal burnt 

 per horse-power per hour. 



Tabular Statement of Results. 



Names of Manufacturers. 



Tuxford and Sons, No. 1 . 

 Ditto ditto No. 1 . . 

 Hensman and Son . 

 Hornsby and Son .... 



Butlin 



Garrett and Son * . . . . 



Caborn 



Clayton, Shuttlewordi, and Co.,1 



No. 1 , 



Clayton, Shuttlevvorth, and Co.. 



No. 2 



Barrett, Exall, and Andrev/s . 



Burrell 



Hansom es and May 



Roe and Hanson .... 



Nominal 

 Horse-power. 



6 

 4 

 4 

 6 



44 



5 



9 



getting up 

 Steam. 



minutes. 

 53 

 414 

 33 

 49 

 50 

 42 

 44 



32 



42 



26 

 28 

 70 

 83 



Coal 

 used in 

 getting up 

 Steam. 



lbs. 

 56-68 

 35-60 

 29-00 

 35-23 

 42-00 

 26-50 

 52-00 



35-40 



Coal 

 burnt per 

 Horse power 

 per Hour. 



lbs. 



7- 46 

 10-80 

 18-75 



6-79 

 14-71 

 lJ-65 

 12-48 



8- 63 



Withdrawn, 



25-56 I 9-20 

 35-00 I 13-10 



Withdrawn. 

 75-20 25-80 



Garrett and Son's slide was wrong in this trial, but in a second ] 

 experiment, tried with Newcastle coal, this engine worked out 

 what would equal ] 



8-63 



Charles John Carr, Belper. 



