116 PROFESSOR A. H. GIBSON ON THE RESISTANCE TO FLOW OF WATER, ETC. 
of the minimum possible loss in a uniformly tapering pipe undergoing the full enlarge- 
ment of section. By designing the pipe from A, to A; with curved boundaries giving 
2 
- anata. the loss may be still further reduced. In the majority of cases 
fe 
_ occurring in practice, however, the additional trouble of calculation and cost of template — 
will not be counterbalanced by the slight increase in efficiency which they render 
possible. | 
In conclusion, the author would acknowledge his indebtedness to the Government 
Grant Committee, by whose grant in aid the provision of the pipes and apparatus used — 
in these experiments has been made possible. 
