Geophysical Abstracts 152 January-March 1953

MAGNETISM 21
14235. Richardson, Max S. Magnetometer system, U. S. patent 2,632,883,
granted March 24, 1953. 1 claim. Assigned to the United States of
America, represented by the Secretary of Navy.
A means of measuring magnetic fields inductively.
14236. Nedzel, V. A, Apparatus and method for measuring magnetic flux, U. S.
patent 2,624,783, granted January 6, 1953. 10 claims. Assigned to
United States of America, represented by the U. S. Atomic Energy
Commission.
The magnetic flux is measured by rotating a coil in a magnetic field, the effects
of which are compared to a known magnetic field.
14237. Schmitt, O. H. Method of magnetic investigation, U. S. patent
2,626,308, granted January 20, 1953. 2 claims. Assigned to United
States of America, represented by the Secretary of Navy.
A means of investigating the magnetic field of a body by substituting for it
three coils mutually at right angles.
14238. Eroding, R. A. Magnetic induction well-logging instrument, U. S. patent
2,625,583, granted January 13, 1953. 15 claims. Assigned to Schlum-
berger Well Surveying Corp.
A system for measuring magnetic susceptibility and electrical conductivity.
METHODS OF ANALYSIS AND INTERPRETATION
14239. Andreyev, B. A. Raschety prostranstvennogo raspredeleniya potentsial'-
. nykh poleye i ikh ispol'zovaniye razvedochnoy geofizike [Computations
of spatial distribution of potential fields and their utilization in geo­
physical exploration] : Akad. Nauk SSSR Izv., Ser. geofiz., no. 2, p. 22-30,
1952.
In preceding studies procedures have been presented for calculating patterns
of potential fields in the upper semispace (see Geophys. Abs. 9629) and in the
lower (see Geophys. Abs. 11605), where the potential sources are located. In
the present study the latter problem is considered again, using the method of
lattices. In this procedure the Laplace equation is written in the following form,
using finite differences : y±\TJ (at'+h, 0)+U (x' h,0)+U (x' h)+U (a?', A)]
U (SB', 0)=0. U is the potential fiinction at the point (x, 0) : its value at ad­
jacent points can be calculated with good accuracy by selecting appropriate
Value for h.
The suggested method can be used to good advantage for determinations of
the intensity and shape of magnetic anomalies on the ground from the data of
an aeromagnetic survey. By having a sufficient number of master charts repre­
senting potential fields corresponding to different positions of underground
sources, it is possible to interpret the results of a new survey by comparison.
Several examples of the use of this procedure are given. S. T. V.
14240. Mikov, D. S. Opredeleniye velichiny i napravleniya intensivnosti
namagnicheniya vozmushchayushchikh tel po rezul'tatam magnitnoy i
gravitatsionnoy s'emki [Determination of the intensity and direction of
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