356 S. H. BARRACLOUGH AND T. £. STRICKLAND. 
EXPERIMENTAL INVESTIGATION or taz FLOW oF 
WATER 1x UNIFORM CHANNELS. 
By S. H. Barractouen, B.£., M.M.E., and T. P. SrRICKLAND, B.E. 
[Read before the Royal Society of N.S. Wales, December 1, 1897.] 
1. Introductory. 
2. Objects of gape 
3. General plan of appara 
4, Supply and control of on “real 
5. Entrance conditions. 
6. The experimental chann 
7. Measurement of the cnatity of water flowing through channel. 
8. Measurement of slop 
9. Method of making an snipes ent. 
10. Reduction of observations, wih degree of precision attained. 
11. Relation Paoli slope and velocity. 
12. tio: ween hydraulic radius and aon 
13. Relation betwee temperature and velo 
; ce ey of results obtained by rit = of the formula of 
and Ganguillet. 
15. Geeta at small slopes. 
e 
— 
1. Introductory.—In a paper' read before the Society, entitled 
“The steady flow of water in uniform pipes and channels,” 
amongst other things the question of the flow of water in open 
channels is touched upon, and the applicability generally of certain 
formule proposed by Prof. O. Reynolds,? is discussed. The 
experiments described in the following paper form part of an 
investigation undertaken with a view of filling in an hiatus’ in 
the existing series of experimental results, so as to admit of a 
1 “The steady flow of water in uniform pipes and channels,” by G. H. 
Knibbs.—Proc. Roy. Soc. N.S.W., Vol. xxx1., p. 314. 
2 Phil. Trans., p. 949, 1883 
3 See Mr. Knibbs’ remarks, pp. 352—355. For Ganguillet and Kutter’s 
recognition of the fact, see also their work on “The flow of water in 
rivers and other channels,” p. 105.— Macmillan, 1889. 
