xliv. ABSTRACT OF PROCEEDINGS. 
In regard to the type of the general formula, the author believes — 
that it will be found capable of being so adjusted, by giving proper 
values to its constants, as to represent not only all old, but also 
new observations of flow in pipes, that is to say, it satisfies the 
requirements of a general formula; and that probably an analogous 
analysis will yield an equally general formula for flow in channels. 
The paper was accompanied by tables for the purpose of facilitating 
computations. 
2. “Experimental investigation of the flow of water in uniform 
channels,” by S. H. BarracLouGH, B.E., M.M.E., and aS 
STRICKLAND, B.E. ; 
This investigation was suggested by Mr. G. H. Knibbs, as a 
result of his examination of the work of previous investigators, 
an account of which appears above, and the experiments were 
carried out in the laboratory of the P. N. Russell Engineering 
School, with the cordial co-operation of Prof. Warren. Its main 
object was to fill in an hiatus in the existing series of experimental 
results, by determining the effect of change of slope upon the 
velocity of flow, when the slope is varied over a wide range. Since 
in making these experiments it was impossible to maintain the 
temperature and hydraulic radius absolutely constant, two sub- 
sidiary enquiries had to be undertaken to determine approximately 
the effect which these two quantities have upon the velocity, in 
order to allow of corrections being applied to the observations in 
the main series of experiments. The apparatus used included (1) 
a four hundred gallon supply tank, fed from a water main, and 
having a special device for automatically maintaining a constant 
head ; (2) a wooden channel having a triangular section, and 
provided with means for ensuring undisturbed entrance conditions; 
(3) a four hundred gallon gauging tank, the capacity of which at 
various points throughout its depth was carefully determined by 
comparison with a standard cubic foot. It is estimated that the 
experimental error involved was less than 1%, The chief con- 
clusions arrived at were that (a) the expression v?™ « i represents 
very accurately the relationship between velocity and slope for 
