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It is unanimously agreed, I think, that of the water which falls upon the Earth's surface, a part runs off toward the sea, a part is at least temporarily detained, a part of it evaporates, and a part sinks beneath the ground‐surface. But among students of that water which sinks beneath the Earth's surface, complete agreement as to the course it then takes has not always prevailed. Ground‐water hyd

The importance of ground‐water as a natural resource to be used for water‐supply and industrial purposes is often overlooked by the general public. A recent survey conducted by the Engineering News‐Record [see 1 of “References” at end of paper], based on data obtained from State Sanitary engineers, shows that 9,100 out of a total of 12,700 public water‐supply systems in the United States obtain wa

The membership of this Committee is as follows: I. A. Dennison, National Bureau of Standards, Washington, D.C.; C. S. Scofield, Bureau of Plant Industry, Department of Agriculture, Washington, D.C.; D. G. Thompson, United States Geological Survey, Washington, D.C.; Prof. T. G. Thompson, University of Washington, Seattle, Washington; and C. S. Howard (Chairman), United States Geological Survey, Was

Professor M. P. O'Brien [see 1, 2 of “References” at end of paper] has recently shown that data on the vertical distribution of velocity through the theory of turbulent flow as developed by Prandtl, Von Karman, and others may be applied to the determination of friction‐coefficients in open channels. Hydrographers in making measurements of river‐flow have often noticed that in streams having rough

The intrusion of salt water in the lower Connecticut River Basin was studied during October 1, 1934, to June 30, 1939. The field‐ and laboratory‐work was done as a project of the Works Progress Administration under the sponsorship of the State Water Commission of the State of Connecticut. Some technical assistance was given by the Geological Survey through cooperation with the State Water Commissi

At the 1939 meeting of the Union [Fundamental research in geophysics relating to prospecting, Trans. Amer. Geophys. Union, 1939, pp. 302 and 390], the writer described a set of scales for aiding in the evaluation of the magnetic anomaly due to a selected magnetized body. During the past year, these scales have been modified in several minor details. The revised forms are shown by typical scales il

The Committee on Glaciers is now composed of the following members: Harry Fielding Reid, Professor Emeritus of Geology, Johns Hopkins University, 608 Cathedral Street, Baltimore, Maryland; William H. Hobbs, Professor Emeritus of Geology, University of Michigan, Ann Arbor, Michigan; Lawrence Martin, Chief of the Division of Maps, Library of Congress, Washington, D.C.; J. E. Church, Professor of Met

The Committee on Underground Waters for the new triennium is composed of the following: H. F. Blaney; E. B. Burwell; W. Gardner; C. S. Howard; F. H. Lahee; G. W. Musgrave; A. M. Piper; A. C. Swinnerton; L. K. Wenzel; D. G. Thompson (Chairman).The outstanding event of the year for ground‐water hydrologists was the meeting of the International Association of Scientific Hydrology, as a part of the In

The Runoff Committee during the year has consisted of H. K. Barrows, Merrill Bernard, E. S. Callings, R. S. Goodridge, G. A. Hathaway, Joseph Jacobs, Prof. F. T. Mavis, H. S. Riesbol, Waldo E. Smith, F. F. Snyder, and H. G. Wilm. The Committee represents a rather wide geographic distribution, quite a large variety of interests, and most of the agencies interested in runoff‐problems.Throughout the

This investigation was undertaken primarily as a pilot‐experiment for gaining information concerning the field‐technique and accuracy which is needed for covering large areas in detail and at the same time economically. Owing to the complex nature of magnetic observations, such a pilot‐study serves, in addition, as a basis for determining the best methods of presenting the results of large areal s

No abstract available.

Different types of phosphate deposits and different sources of phosphate in the United States are briefly discussed. In Florida two types of phosphate are now mined, land pebble and hard rock. The principal characteristics of these types of rock are stated and methods of prospecting, mining and recovery briefly outlined. Testimony given before the Congressional Committee to Investigate the Adequac