GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



399 



STEAM ENGINES, IN SEPTEMBER 1834. 



Number 



of 

 strokes. 



Lgth 

 of the 

 stroke 

 in the 

 pump. 



Load, in 

 pounds. 



Pounds lifted 

 one foot high, 

 by consum- 

 ing a bushel 

 of coal. 



Num- 

 ber of 



strokes 

 per 



minute 



REMARKS, AND ENGINEERS' NAMES. 



lo-<i4oU 



feet 

 / 





AO f\AA 1 '7f\ 



4,0 



Drawing 90 fathoms perpendicularly, 

 and 87 fathoms diagonally. Main 

 beam over the cylinder; one balance 

 bob at the surface, and one under 

 ground. 



Richards. 



173980 



7 



37675 



65,360,221 



4,3 



Drawing perpendicularly 108 fathoms, 

 and the remainder diagonally. Main 

 beam over the cylinder ; one balance 

 bob at the surface, and one balance 

 lift (30 fathoms of 14 inches) in the 

 shaft. 



Richards. 



164510 



6,5 



45063 



31,128,257 



3,9 



Drawing perpendicularly. Main beam 

 over the cylinder, and one bob at the 

 surface. 



S. Grose and J. West. 



109810 



7,5 



23730 



47,092,313 



2,6 



Drawing perpendicularly. Main beam 

 over the cylinder, and one balance bob 

 at the surface. 



S. Grose and J. West. 



141940 



7,5 



49356 



34,341,130 



3,4 



Drawing perpendicularly. Main beam 

 over the cylinder, and one balance bob 

 at the surface. 



S. Grose and J. West. 



257930 



6,75 



16439 



36,228,798 



6,17 



Drawing perpendicularly. Main beam 

 over the cylinder, and one balance bob 



at the surface. 



J. West. 



123110 



5,75 



16668 



23,135,265 



2,85 



Drawing the load 47 fathoms per- 

 pendicularly, and the remainder diago- 

 nally. Main beam over the cylinder, 

 and one balance bob at the surface. 



EusTis AND Son. 



