摘要:

The purpose of this paper is to cover the technical details of the measurements, and results derived from them, made for the control of the basin and rail extensions of the David W. Taylor Model Basin, U.S. Navy, Carderock, Maryland. There are two basins in the present building, running approximately east and west, the south or deep basin, and the north or high‐speed basin. These are about 1300 feet in length. Construction is now under way for the extension of these basins, and the building to enclose them, in an easterly direction for a distance of about 1800 fee

ISSN:0002-8606    

DOI:10.1029/TR027i002p00151

年代:1946

数据来源: WILEY

摘要:

The existence of close connections between solar activity and physical processes in the upper atmosphere, such as auroras, magnetic storms, and ionospheric variations is well established. Whether similar relations exist between solar activity and the state of the lower atmosphere is an open and sometimes hotly debated question. Solar energy is universally considered as the driving power of the atmospheric engine. However, many meteorologists feel that the observed changes of the solar constant, even if they are real and not only caused by changes of atmospheric transparency, are too small to produce any noticeable changes in the atmospheric circulation.

ISSN:0002-8606    

DOI:10.1029/TR027i002p00161

年代:1946

数据来源: WILEY

摘要:

This paper makes use of a discussion of Gauss' method of measuring the horizontal component of the Earth's magnetic field as a means for presenting those ideas concerning the natures of magnetic quantities which have been promulgated by the International Eleetrotechnical Commission. Reference is also made to the actions taken or initiated by the International Electrotechnical Commission (hereafter abbreviated IEC) relative to the fundamentals of measurements of mechanic, electric, and magnetic quantities.

ISSN:0002-8606    

DOI:10.1029/TR027i002p00164

年代:1946

数据来源: WILEY

摘要:

The bending of water waves by islands and shoals with circular bottom‐contours is Investigated from an analytical standpoint to obtain a precise determination of resulting wave‐patterns and wave‐heights. SNELL'S law of refraction is assumed, and FERMAT'S law or the principle of least time therefore applies. Application of FERMAT'S law and of the established relation between wave‐velocity and depth of water enables determinations of lines orthogonal to tho wave crests for various types of contour gradients. Five different cases are discussed. It is shown that for certain contour gradients, islands have no shore protected from high waves. A shoal is characterized by the dividing of a single crest Into two crests. Height variation along refracted crests at considerable distances beyond an island is shown to bo critically dependent upon contour g

ISSN:0002-8606    

DOI:10.1029/TR027i002p00168

年代:1946

数据来源: WILEY

摘要:

(a) Evidence is presented which shows that the gases emitted by the Aguan flow of lava at Parícutin did not burn when they came in contact with the air. (b) The temperature of the lava at its source was estimated to be 1200°C and thus lies in the same range as that for other basaltic lavas. (c) Temperature‐measurements were also made of the fumaroles located on the older Zapichu flow where a maximum of 640°C was reco

ISSN:0002-8606    

DOI:10.1029/TR027i002p00178

年代:1946

数据来源: WILEY

摘要:

Experiments designed to determine the effects of gypsum and organic matter on the infiltration rate of relatively impermeable soils were conducted in the Coachella Valley of southern California on an area devoted to the growing of date palms. The irrigation water used was relatively low in salts, a high percentage of which was in the sodium cation. It was found that spading gypsum into the soil at a rate of five tons per acre, or organic matter in the form of chopped alfalfa at the same rate, were both highly effective in that they both approximately doubled the infiltration rate during a two‐year experiment. It was found that a prolonged drying period, between times of infiltration, extending to the wilting range, was even more effective in increasing the rate of infiltration. Laboratory experiments on permeability generally supported the field result

ISSN:0002-8606    

DOI:10.1029/TR027i002p00181

年代:1946

数据来源: WILEY

摘要:

The results of studies of the flow of water through various grass and legume covers are presented. The paper is concerned with low flows which are defined as those coursing through a vegetal cover without completely inundating the plants. The retardance to flow is expressed in MANNING'S n, The relation of n with depth and velocity of flow, since these affect the position and behavior of the vegetation, is presented.

ISSN:0002-8606    

DOI:10.1029/TR027i002p00187

年代:1946

数据来源: WILEY

摘要:

A partial differential equation is set up for radial flow in an elastic artesian aquifer into which there is vertical leakage in proportion to the drawdown. This differential equation is integrated to obtain two steady state solutions, one for the case of a well in an infinite aquifer, and the other for the case where the head is maintained constant along an outer boundary concentric with the well. In the second case, the solution of the non‐steady state is also obtained for flow towards a well discharging at a steady rate, the initial state being one of uniform head distribution. A table and some curves are given for one set of assumed values of three of the parameters of the syste

ISSN:0002-8606    

DOI:10.1029/TR027i002p00198

年代:1946

数据来源: WILEY

摘要:

(l) Report on the Proceedings of the Seventh (Washington) General Assembly; (2) report of the General Secretary for the war period; (3) notes on administration; (4) balance sheet of Union funds for the period January 1, 1939, to November 30, 1945; (5) recommendations on the future administration of the Union, made by the British National Committee in February 1945; (6) provisional agenda.

ISSN:0002-8606    

DOI:10.1029/TR027i002p00209

年代:1946

数据来源: WILEY

摘要:

This report has been prepared by the Chairman of the Committee, to inform Members of the Section of Terrestrial Magnetism and Electricity of the activities of the Committee to date. It is not to be construed as a report of the Committee.The Special Committee on Units was authorized by the Section in 1941 [see Minutes, “References” at end of Report], Through oversight, it was not appointed at that time, and it was again authorized in 1942. It was actually appointed early in 1943, and hence has been in existence about three years. The Members of the Committee are H, H. Howe (Chairman), F. C. Farnham, H. T. Stetson, E. H. Vestine, and Frank Wen

ISSN:0002-8606    

DOI:10.1029/TR027i002p00215

年代:1946

数据来源: WILEY