ENGINE No. 98. 



Diagram No. 98 is taken from an 8" steam pipe supplying 

 a 24" x 48" Corliss engine running at a speed of 62 rev- 

 olutions per minute. 



-100 



-so 



GO 



-40 



20 



- 



- 10 



The pipe is 135 feet in length, and contains 5 short ri^l it- 

 angle elbows and two 4;"> degree elbows. The lines in this 

 diagram are very clearly marked. There is a sudden drop in 

 the pressure just at the beginning of the stroke, and there is a 

 marked rise of pressure at the point of <-Ht-<>tT. There seems to 

 be little variation of pressure after this time until nearly the 

 end of the stroke. During the very last part of the stroke, 

 however, the pressure drops the same as noticed in many of the 

 preceding diagrams, although there appears to be no action in 

 the working of the steam in the cylinder that should cause it. 

 This is one of the things thai makes the reasons for the par- 

 ticular conformation of steam-pipe diagrams obscure. 



