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 LXII. Intelligence and Miscellaneous Articles, 



STEAM ENGINES IN CORNWALL. 



By Messrs. Leans' Report for September, the average work 

 of 28 engines, on the old construction, was 20,672,934 pounds 

 of water lifted one foot high with each bushel of coals con- 

 sumed. 



The work of Woolf's engine at Wheal Vor for the same month, 

 was 44,033,831 pounds; and of his engine at Wheal Abraham 

 51,348,291 pounds, lifted one foot high with each bushel of coals 

 — the load 15 lib 2 oz. per inch in cylinder. His other engine 

 at the latter mine lifted 22,477,408 pounds with each bushel, 

 her load being as yet only 3-1 per inch in cylinder. 



In the same month an engine is reported at Dalcouth to have 

 lifted 40,749,286 pounds with a load of nine pounds per square 

 inch, and one at Wheal Chance 44,354,000 pounds with a load 

 of 12-6 per square inch, with each bushel of coals. We con- 

 clude, though this is not avowed, that Woolf's principle of 

 using steam above the temperature of 212', and allowing it to 

 expand, has been in some way applied to these engines ; and we 

 do so because Mr. Watt has often declared that the maximum 

 of the best engines on his, which is now the old, principle, is 

 29 millions of pounds lifted one foot high with each bushel of 

 coals; and we know that his statement cannot be controverted, 



SOLAR ECLIPSE, NOVEMBER 19, 1816. 



To Mr. Tiiloch. 

 Sir, — As the eclipse of the sun, which takes place on the 

 19th of the ensuing month, will be the greatest that will happen 

 ill this part of the world for many years, it will naturally excite 

 considerable attention. It may be necessary however to inform 

 your astronomical readers, that the first impression of the moon 

 «.;) the sun's disc will be 20° from the vertex of the sun, on the 

 right hand ; and not 59^ as stated in the Nautical Almanac. 

 This remark is of importance to those who are desirous of ob- 

 'erving accurately the time and progress of the eclipse. The 

 visible conjunction is also inaccurately stated in the same Al- 

 manac, since it takes place full one hour sooner than there set 

 •iown. It is no great recommendation to that work, to know 

 that all the elements of this eclipse are more correctly stated in 

 Moore's Almanac. 



I am, sir, your obedient servant, 



Oct. 26, 1816. ASTRONOMICUS. 



