^98 



TRANSACTIONS OF THE 



WORK PERFORMED BY THE FOLLOWING 



MINES. 



ENGINE, 

 and the 

 diameter 

 of the cylinder, 



Load 

 in 



horse 

 power, 

 on the 

 piston. 



Load 

 per 

 square 



inch, 

 on the 

 piston. 



Length 

 of the 

 stroke, 

 in the 

 cylin- 

 der. 



No. 

 of 

 lifts. 



Depth. 



Diam- 

 eter of 



the 

 pump. 



Time. 



Con- 

 sump- 

 tion of 

 coal in 

 bush- 

 els. 



LrREAT VV ORK 



Wheel 

 Breage 

 en o'inej 

 60 inches, 

 single. 





lbs. 



feet 

 q 



2 

 1 

 4 

 1 



fms ft 



23 0 

 32 3 

 105 0 

 11 0 



ins. 



15 

 12 

 10 



8i 



Aug 30 



to 

 Sep 27 





Ditto 



Leeds's 

 engine, 

 60 inches, 

 single. 



219,7 



11,66 



8 



1 

 5 

 1 



35 1 

 126 5 

 10 3 



» 







12 

 10 



8 



ditto 



702 



























Great 

 St George 



North 

 engine, 

 60 inches,, 

 single. 



195,2 



10,36 



10 



1 

 2 

 1 



60 

 62 3 

 11 0 



10 

 17 



Sep 3 



to 

 Oct 2 



1548 



Ditto 



oouth 

 engine, 

 40 inches, 

 single. 



131,7 



15,74 



9 



2 

 1 



68 5 

 10 0 



12 

 13 



ditto 



415 























Ditto 



Devon- 

 shire's 

 engine, 

 70 inches, 

 single. 



246,2 



9,6 



10 



1 

 1 



3 



1 1 



43 1 

 69 2 



13 

 17 



ditto 



1530 























Wheal 

 Prudence 



33 inches, 

 single. 



84,3 



14,8 



8,75 



1 



2 

 1 



45 0 

 561 

 12 5 



6 



ditto 



790 



Wheel 

 Retallack 



North 

 engine, 

 36 inches, 

 single. 



81,4 



12 



7,84 



1 



2 



70 



54 3 



6 

 12 



Aug 26 



to 

 Sep 25 



510 



