GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



397 



STEAM ENGINES, IN SEPTEMBER 1834. 



Number 



of 

 strokes. 



Lgth 

 of the 

 stroke 

 in the 

 pump. 



Load, in 

 pounds. 



Pounds lifted Num- 

 one foot high, her of 

 by consum- strokes 

 ing a bushel | per 

 of coal. minute 

 1 



REMARKS, AND ENGINEERS' NAMES. 



201370 



feet 

 5,5 





9182 



41,005,590 



4,8 



Drawing perpendicularly, with main 

 beam over the cylinder. 



W. Petherick and W. West. 



291320 



6,8 



] 



L3433 



48,294,828 



6,97 



Drawing in two shafts perpendicular- 

 ly, with main beam over the cylinder; 

 and two bobs and 100 fathoms hori- 



/icUiitcii iUuo <X\i Lilt! blilluC"* 



S. Trethewy. 



262700 



8 



53173 





6,28 



Drawing the load perpendicularly. 

 Main beam over the cylinder. 



S. Truran. 



68720 



7,75 



39292 



43,962,465 



1,64 



Drawing the load perpendicularly. 

 Main beam over the cylinder, and one 

 balance bob at the surface. 



S. Truran. 



259720 



8 



78404 



82,860,984 



6,44 



Drawing perpendicularly 160 fathoms, 

 auu Lii« iciudnjuci uidgonauy. iviam 

 beam over the cylinder; one balance 

 bob at the surface, and four ditto and 

 a V bob underground. 



Richards. 



258120 



7.5 



104909 



59,073,104 



6,4 



i^idwiiig perpenuicuiariy loO latnoms, 

 and the remainder diagonally. Main 

 beam over the cylinder; three balance 

 bobs under ground, and one at the 

 surface. 



Richards. 





7,5 



42446 







jjrawmg perpenaicuiariy ioi latnoms, 

 and diagonally 20 fathoms. Main beam 

 over the cylinder; two bobs under 

 ground, and one at the surface. 



Richards. 



2 



23290 



5,6 

 4,8 



31480 

 1724 



54,082,830 



5,5 



Drawing the load in two shafts per- 

 pendicularly. Main beam under the 

 cylinder; two bobs and 117 fathoms 

 of horizontal rods at the surface. 



Richards. 

 — — — . 



