486 JAMES WATT. 
each indicated horse-power of the engine = 33,000 lbs. 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 bias 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 in 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 mérits of one 
of our first practical mechanics, the able assistant and coadju- 
tor of James Watt. 
W. F. 
THE END. 
