FURNACE AT THE CITY SAW MILLS. 



THE STEAM ENGINE. 



CHAPTER III. 



41. Comparative merits of the two kinds of engines. 42. Various modes 

 of transmitting force. 43. Description of a factory engine. 44. The 

 governor. 45. The eccentric. 46. The fly-wheel. 47. Parallel 

 motion. 48. Barometer gauge. 49. How to compute the effective 

 moving force of the piston. 50. Method not considered sufficiently 

 accurate. 51. Indicator. 52. Mode of recording its positions. 53. 

 Its application in finding effective force. 54. Watt's counter. 55. 

 Conclusion. 



41. THAT the advantages arising from the diminished reaction 

 on the piston, produced hy the condensation of the steam, are not 

 altogether to he placed to the account of increased moving power, 

 will he apparent when it is observed that no inconsiderable part 

 of the power thus gained is absorbed by the cold-water pump, the 

 air pump, and the hot-water pump, all of which are worked by 

 the engine. Neither is the vacuum into which the piston moves, 

 LARDNER'S MUSEUM OF SCIENCE. D 33 



No. 61. 



