Hydrometry by Magnetic Attraction

Abstract

The method here reported is concerned with hydrometry by magnetic attraction of a coil acting upon a float with soft iron.
The coil is outside of the vessel containing the float and the liquid to be measured.
It is recognized experimentally that this method has the same merits as the formerly reported type, and besides them, it has other merits, for example
a) Either the density of liquid with more or less density than the float can be measured.
b) The current of coil may be either DC or AC.
etc.