42 AdRlCULTUKAL ENGINES. 



tibout 84 Ibs. (or one bushel), to lift 10,000 tons of water or 

 earth 1 foot high. 



" The average cost of this coal in the kingdom is sixpence. 

 The average of a horse's labour for one day is about 4000 tons 

 lifted 1 foot high, costing about 5s. 



" A. man's labour for one day is about 500 tons lifted 1 foot 

 high, costing 3s. 6d. 



" I have had repeated trials of the water lifted by coals, 

 horses, and men, proving that where a bushel of coal can be 

 purchased for sixpence, that sixpence is equal to 20s. of horse 

 labour, and to 31. 10s. of men's labour. 



" If you calculate a man to lift 500 tons 1 foot high, it is 

 equal to 100 tons lifted 5 feet high ; a very hard task for a man 

 to perform in a day's work. 



" This calculation proves the great advantage of elemental 

 power over animal power, which latter I believe can in a great 

 part be dispensed with if properly attended to, especially as we 

 have an inexhaustible quantity of coals. 



" To prove to you that my ideas are not mere ideas, in general 

 my wild ideas lead to theory, and theory leads to practice, and 

 then follows the result, which sometimes proves of essential ser- 

 vice to the public. 



" About six years ago I turned my thoughts to this subject, 

 and made a travelling steam-engine at my own expense to try 

 the experiment. 



" 1 chained four waggons to the engine, each loaded with 

 24 tons of iron, besides seventy men riding on the waggons, 

 making altogether about 25 tons, and drew it on the road from 

 Merthyr to the Quaker's-yard (in South Wales), a distance of 

 i)J miles, at the rate of four miles per hour, without the assistance 

 of either man or beast, and then, without the load, drove the 

 engine on the road sixteen miles per hour. 



" I thought this experiment would show to the public quite 

 enough to recommend its general use ; but though promising to 

 be of so much consequence, has so far remained buried, which 

 discourages me from again trying, at my own expense, for the 

 public, especially when my family call for the whole of my 

 receipts from my mining concerns for their maintenance. 



