368 REPORTS ON THE STATE OF SCIENCE, ETC. 
in each case, whether from lakes, rivers or streams, upland surfaces, springs 
or underground sources. 
(b) The Final Report of the Water Power Resources Committee, 1921. 
A summary of the report is given in pp. 72-86. Appendix L (p. 146 
onwards) contains details of a system by which the compilation of records 
can be effected. 
(c) The Final Report of the Water Power Committee of the Conjoint Board of 
Scientific Societies. 
(d) ‘ Report on Stream Flow and Underground Water Records,’ Trans. 
Inst. Water Eng., vol. xxxiv, 1929. 
(e) Annual Reports of the Water Pollution Research Board of the Department 
of Scientific and Industrial Research. 
Recent reports have stressed the importance of systematic records of river 
flow in considering problems of the disposal of sewage and trade effluents. 
(f) Ministry of Health Advisory Committee on Water. Reportof the Technical 
Sub-committee on the Assessment of Compensation Water, 1930. 
The conclusions set forth in the report are based on records from a 
number of catchment areas, which are not available to the general public. 
Some comments on this report are given in the Report of the British 
Waterworks Association, 1930. 
(g) Water Pollution Research. Technical Paper No. 2: Survey of the 
River Tees. Part I : Hydrographical, published by the Department 
of Scientific and Industrial Research, 1931. 
This report gives the results of measurements of current flows in the 
tidal estuary of the river Tees during 1929. It also includes measurements 
of freshwater flow at different levels. "These measurements were made in 
surveying the river Tees in connection with pollution problems. Additional 
measurements were continued until about June 1932, and it is expected 
that these will be included in a Final Report of the Survey, to be published 
during the next year or two. The measurements have not included 
continuous records of water level. 
(h) British Waterworks Year Book and Directory, with statistical tables, 
published by the British Waterworks Association. 
The third edition, for 1930-31, contains useful information respecting 
871 water undertakings. The information deals with such subjects as 
sources of supply, filtration, distribution, hardness of the water, total 
quantity supplied and estimated population. 
2. THE MEASUREMENT OF STREAM FLow. 
(a) Report on Current Meters for use in River Gauging, 1922. 
(b) Report on River Gauging (dealing with methods and appliances suitable 
for use in Great Britain), 1925. 
These two reports were prepared by M. A. Hogan for the Committee on 
Gauging Rivers and Tidal Currents, of the Department of Scientific and 
Industrial Research. The former deals with the information available as 
to the conditions affecting the design and use of current meters, and gives 
a description of those types in use. 
(c) The Gauging of Rivers, statement on pp. 14 and 15 of the rath Annual 
Report of the Ministry of Health, 1930-31. 
This statement in reference to the more systematic gauging of rivers and 
underground waters is based on the work of a Committee set up by the 
Minister of Health to consider the subject and to act as a Sub-committee 
of the Ministry’s Advisory Committee on Water. 
