550 Report on the Exhibition of Implements 



which has proved so excellent a test of the relative powers of the 

 different engines and machines. And we think great credit also due 

 to the Society's engineer, Mr. Amos, for the very efficient arrange- 

 ments made by him for ascertaining the real power absorbed for 

 the amount of work performed by each threshing and other ma- 

 chine subjected to this trial. 



" In the following remarks we have taken the engines in the 

 order as entered in the Catalogue, and under their respective 

 stands and numbers, for easy reference. 



Page 16,— Stand 5, art. I, 2, 3. 



'' Three portable steam-engines, manufactured by Messrs. 

 Clayton, Shuttleworth, and Co., the powers of 5, 7, and 9 horses 

 respectively. Two of these engines were of the same construction, 

 the third a two-cylinder engine, which we think an unnecessary 

 complication when designed for agricultural purposes. The 

 three boilers were all tubular, and precisely the same in make, 

 thereby obtaining on the trial an unfair advantage over but one 

 of a kind exhibited by other parties. In saying this, we intend 

 not the slightest reflection upon Messrs. Clayton, Shuttleworth, 

 and Co., but under similar circumstances ive should recommend in 

 future that but one of a kind should be tested for each exhibitor. 

 The workmanship of these engines was good, the arrangement for 

 working the governors new, and the general performance satis- 

 factory, doing good duty for the fuel consumed, as will be seen by 

 reference to the tabular statement. 



The crank -shaft we thought too short between the bearings to 

 remain steady in constant wear ; the piston and valve- rods worked 

 through screw stuffing-boxes, which is a method now seldom 

 adopted but for the sake of cheapness ; the engines were mounted 

 on iron wheels, which we think not so suitable for farm roads as 

 wooden ones. Having made these observations, we have now the 

 pleasure to add that we felt so well satisfied with the quick gene- 

 ration of steam and duty done by these engines, as to select the 

 7 -horse article, No. 2, for the second prize of twenty-five 

 pounds." 



Page 22.— Stand 13, art. I. 

 ''A 4-horse portable engine, manufactured by Mr. Burrell. 

 This engine in workmanship was moderate : it was fitted with 

 three different speeds, the governors being made adjustable to the 

 same. The duty performed for the coal consumed will be seen to 

 be less than half that of the prize-engines, which sufficiently 

 stamps its comparative merits." 



Page 134.— Stand 65, art. 8. 

 " A 6-horse portable engine, manufactured by Mr. Hornsby. 



