But I understand by free formations of nature those whereby from a fluid at rest, through the volatilisation or separation of a portion of its constituents (sometimes merely of caloric), the remainder in becoming solid assumes a definite shape or tissue (figure or texture), which is different according to the specific difference of the material, but in the same material is constant. Here it is always presupposed that we are speaking of a perfect fluid, i.e. that the material in it is completely dissolved, and that it is not a mere medley of solid particles in a state of suspension.
