330 REPORTS ON THE STATE OF SCIENCE, ETC. 
and the Committee appointed the following ‘ Sections ’ Sub-Committee : 
Col. E. Gold (Section A), Prof. W. S. Boulton (Section C), Dr. L. Dudley 
Stamp (Section E), Mr. W. T. Halcrow (Section G), the Chairman and the 
Secretary. 
VI. REPoRT OF THE ‘ SECTIONS’? SUB-COMMITTEE. 
This Sub-Committee met on March 11, at which meeting all members 
were present, and the following recommendations were agreed : 
‘1. The Sub-Committee recommends that at the Norwich Meeting of 
the British Association in September next, the various sections represented 
on the Inland Water Survey Committee be informed that the main purpose 
of that Committee, as defined in its terms of reference, appears to have been 
achieved by the reports of this Committee already published and by the 
appointment of the Inland Water Survey Committee by the Minister of 
Health and the Secretary of State for Scotland.’ 
‘2. Nevertheless, the Sub-Committee is of opinion that valuable work 
may still be done by a British Association Committee, and it recommends 
that the present Committee be continued or a new Committee appointed 
with fresh terms of reference.’ 
‘3. The Sub-Committee suggested that these terms of reference might 
include the following : 
‘'To assist generally in promoting research into the inland water 
resources of the country on such lines as may best achieve this object.’ 
Col. E. Gold wrote, on March 28, suggesting that paragraph 3 should be 
modified to read : 
‘To assist generally in promoting research into the inland water 
resources of the country, and in particular into underground water supply 
and river flow.’ 
STRESSES IN OVERSTRAINED MATERIALS. 
Report of Committee on Stresses in Overstrained Materials (Sir HENRY 
Fow er, K.B.E., Chairman; Dr. J. G. Docuerty, Secretary ; 
Prof. G. Cook, Prof. P. B. Haicu, Mr. J. 5S. Witson). 
Tue Committee has directed particular attention to overstrain in mild and 
moderately high-tensile steels as used in current structural and general 
engineering practice in bridges, buildings, high-pressure pipe lines and other 
applications in which safety depends directly on the avoidance of undue 
plastic overstrain in the ductile metal. 
The results of a number of investigations carried out on its behalf have 
been published in the Report of the Committee for 1931, and in the following 
papers : 
‘ The Yield Point and Initial Stages of Plastic Strainin Mild Steel subjected 
to Uniform and Non-uniform Distributions of Stress,’ by Prof. G. Cook, 
D.Sc. (Phil. Trans. A., ccxxx, 103-147). 
‘ The Elastic Limit of Metals Exposed to Tri-axial Stress,’ by Prof. G. 
Cook, D.Sc. (Proc. Roy. Soc. A., cxxxvii (1932), 559). 
‘ The Stresses in Thick-walled Cylinders of Mild Steel Overstrained by 
Internal Pressure,’ by Prof. G. Cook, D.Sc. (Proc. I. Mech. E. (1934), 
CXXVi, 407). 
