is seen from this equation to vary as the cube root of
. This is the method which, in view of the accurate evaluation of
, it is now desirable to use for the determination of the weight or dimensions of any minute body, for the method is quite independent of the nature of the body or of the medium in which it is immersed. Indeed, it constitutes as direct and certain a weighing of the body as though it were weighed on a mechanical balance.
VI. THE EVALUATION OF
AND
