XXX 
Prizes for Implements and Machinery. 
CONDITIONS KELATING TO MACHINERY. 
Steam Engines. 
All Engines must be fitted with a Steam-Indicator, in addition to the 
ordinary Spring-Balance, which Indicator must be proved by the Indicator of 
the Society. 
Portable Engines. 
1. All the general conditions respecting Steam-Engines and boilers will have 
to be observed. 
2. The nominal power of the engines entered for trial will be taken at one- 
third the indicated power, at 60 lbs. pressure in the boiler, cutting off at three- 
fourths the stroke, and the periphery of the fly-wheel running 1884 feet per 
minute. 
3. The engines will be tested by the Society's friction-breaks, worked by 
means of connecting-rod and universal joints direct from the crank-shaft. 
Each engine entered will have to be fitted with a clutch, shown in detail in 
Fig. 4, Form A of Engineer's Instructions ; and to facilitate the Society's 
arrangements, the height of the crank -shaft of each engine above the ground 
must be stated when the si^ecification is sent in to the Secretary. 
4. The engines will be tested for economy in coal, water, lubrication, and 
steadiness in running. Indicator diagrams will also be taken, and therefore 
the preparations for receiving the indicators, described in Form A, must be 
provided. 
5. During the trial-runs one man only will be allowed to attend the engine. 
Over or under-running will not be permitted ; stead j' running, as nearly as 
possible at the speed declared at entry, will be considered a point of merit. The 
engines must be fitted with governors, and the efficiency of the latter will be 
tested after the trials for economy of working are over, by suddenly varying 
the load on the brake. 
6. Exhibitors shall, on making their final specifications, elect at what steam- 
pressure, not exceeding the declared pressure, what horse-power on the brake, 
and what number of revolutions they would wish to be tried. 
7. The order in which the several engines will be tested will be determined 
by the Stewards, who will decide by lot. 
8. Detached feed-water-heaters, not ordinarily sold with engines, and 
included in the prices entered, will not be allowed, but heaters jicrmanently 
fixed to the engines or arrangements for carrying waste steam toUhe water- 
tanks, provided they are included in the price of the engine, will be admitted. 
9. The trials of the Steam-Engines will be made with Llangennech coal. 
Threshing Machines. 
10. The Threshing Machines will bo driven by a portable engine through 
a registering dynamometer, both provided by the Society. The driving- 
pulleys on the machines must be adapted to 1884 feet per minute sj)eed of 
driving belt. 
11. Tlie merits of the machines will depend upon the price, economy of 
power and time ; the marks obtained for clean threshing, clean shaking, 
