Æquilibria

To Hydroſtaticks belongs whatever relates to the Gravities and Æquilibria of Liquors, with the Art of weighing Bodies in Water, in order to eſtimate the ſpecifick Gravities.

The structural analysis indicates two levels; plain fibres, which can be described more geometrico, and complex æquilibria of fibres, which cannot be accounted for geometrically: wherefore it is necessary to subordinate geometry to observation.