Abstract
A description is given of the conditions in practical prospecting calling for a more portable, and rapid-acting gravity balance and leading up to the design of the gravity gradiometer. The dynamics of the suspended system of a gravity balance are investigated and the dynamical characteristics of the gradiometer indicated. A detailed description of the original instrument follows, with particulars of improvements incorporated in the latest pattern. Finally, a review of the field performance, as regards sensitivity and accuracy, of the gradiometer is given, with an account of a comparative test made on it in conjunction with a standard type of torsion balance. The gradiometer is shown to be a great improvement in the direction of portability and rapidity of action, and the design entails very little sacrifice of sensitivity. The latest pattern can be made five times as sensitive as the earlier model, without diminution of the rapidity of action.
Published Version
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