486 JAMES WATT. 



each indicated horse-power of the engine = 33,000 Ibs. raised 

 one foot high per minute, is at" least twice as much as its 

 nominal power, or twice as much as an ordinary horse could 

 work up to. We shall then find that it would require no less 

 than 250,974 living horses to perform the work of the engines 

 constructed by Messrs. Boulton and Watt up to January 

 1854. 



One of Watt's fellow labourers should hardly be passed over 

 in any statement connected with the steam-engine ; we allude 

 to the late Mr. William Murdock, whose vast practical knowl- 

 edge was employed in carrying out the designs of Watt for 

 upwards of half a century. Mr. Murdock directed the appli- 

 cation of the new steam-engines to drain the water of the 

 Cornish mines. In order to adapt that moving power to ex- 

 hausting pumps, and to establish the system in mines of 

 extreme depth inundated by appalling quantities of water, 

 great skill iu practical mechanics was requisite. Mr. Murdock 

 showed that he had sufficient resources of genius and wisdom 

 of experience to triumph over every difficulty. He was the 

 introducer of the system of lighting by coal gas, and for his 

 paper on that subject sent to the Royal Society he received 

 the Rumford gold medal. He was also the patentee of some 

 new methods of constructing steam-engines, &c., and his sug- 

 gestions often enriched the Soho machinery. We have there- 

 fore great pleasure in bearing testimony to the merits of one 

 of our first practical mechanics, the able assistant and coadju- 

 tor of James Watt. 



W. F. 



THE END. 



