2 Steam Engine. 
cle is chiefly drawn up by Mr. J. C. Hornblower, who 
had a law suit with Mr. James Watt, of Birmingham^ 
wherein the latter was plaintiff, on the subject of infring- 
ing the patent right of Mr. Watt. Mr. Hornblower was 
cast. The article in Gregory, is drawn up with so much 
illiberality of remark on the pretensions of Mr. James 
Watt, and on the article in the Edinburgh Encyclopedia 
above referred to, that I have been able to make a few ex<» 
tracts only from it, for the use of the Emporium. This 
tract of Gregory’s induced 
3dly. A review of Gregory’s account steam engines, in 
the 26th number of the Edinburgh Review, for January 
1809. This very able and very severe article, I have been 
given to understand, was written by Professor Playfair, of 
Edinburgh, whose very brief but very neat account of the 
history of steam engines, I shall extract. 
4thly. I have consulted, and shall use, Nicholson’s ac- 
count of Watt’s steam engine in his 8vo. Encyclopedia ; 
a work, written under the pressure of straitened circum- 
stances, and therefore not with the usual care of this most 
useful and industrious man. 
5thly, I have consulted the following articles on the 
subject in Nicholson’s Journal, viz. 1 V. 419. 2 V. 46 
228. 364. 476. 3 V. 86. 161. 4 V. 545. 5 V. 147. of the 
quarto edition. Of the 8vo. series, I V. 161.2 V. 68. 
6 V. 218.249. 7 V, 310. 8 V. 169. 262. llV. 93. 
243. 12 V. 1. 174. 294. 316. 17 V. 5. 18 V. 260. 
And the following articles in that collection on horse 
power, 9 V. 214. 11 V. 96. 98. 145. 264. 271. 
I have also consulted the articles giving an account of 
Cartwright’s, Trevethic’s, and Woolfe’s improvements on 
Watt’s engine in Tilloch’s Philosophical Magazine, 
wherein the articles relating to the steam engines, are to 
be found in 1 V, 1. 16 V. 372. 17 V. 40. 164. 19 
