XI. Observations on the anomalous behaviour of delicate balances and an account of devices for increasing accuracy in weighings

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Abstract
In this communication it is desired to draw attention to certain difficulties which were encountered during the standardization of a set of weights, and to show how they were investigated and overcome. The weights were compared by the combined methods of vibration and reversal, the sensibility of the balance being determined for each particular load either immediately before or after the completion of a comparison. The usual custom of observing the pointer through a telescope was also followed. The limits of the pointer’s excursions to the right and left of the resting-point (R. P.) were estimated in tenths of a scale division.

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