26 DONALD C. BARTON 
DATA 
The data used in the calculations were: 
A. Three closely adjacent diametral lines of torsion-balance sta- 
tions (Fig. 1). 

5000 FEET 
= 

1500 METER: 
Ea 
v 
A 
ao) 

Fic. 1.—Map showing the gradient arrows of the torsion-balance surveys, and the 
structure contours on top of the cap, from well data, Barbers Hill salt dome. 

10000 
a b c 
ae f 9 
Fic. 2.—Section and gradient profile, Barbers Hill salt dome. Above: gradient 
profile. Below: structure section showing the known data of the cap and the assumed 
positions (a to g) of the flank of the salt core. 
The torsion-balance lines were part of a survey by the Torsion 
Balance Exploration Company for the Humphreys Corporation sev- 
eral years ago and were obtained through the courtesy of Sidney A. 
Judson of the Texas Gulf Producing Company. 
The stations presumably are good normal stations, as the survey 
was made by the Torsion Balance Exploration Company. For quanti- 
tative calculations of this type, care beyond that used normally in 
the preparation of stations and in the taking of the stations should 
686 
