Parry. — Resistance to Flow of Fluids through Pipes. 



487 



It is claimed as a result of this investigation that fairly definite limits 

 have been set within which the loss of head for almost any kind of pipe 

 can be ascertained, but that the exact expression for any class of pipe is not 



Fig. 



at present ascertainable and cannot be ascertained unless the range of 

 observations is considerably extended. Certain conclusions may also be 

 drawn as to the value of 1/C^ for very large values of log vd/v, and that 

 such values tend towards being constant, the value being that of the second 



