We shall see that the mathematical treatment of the subject [of electricity] has been greatly developed by writers who express themselves in terms of the 'Two **fluids**' theory. Their results, however, have been deduced entirely from data which can be proved by experiment, and which must therefore be true, whether we adopt the theory of two **fluids** or not. The experimental verification of the mathematical results therefore is no evidence for or against the peculiar doctrines of this theory.

— A Treatise on Electricity and Magnetism (1873), §36.

Our design, not respecting arts, but philosophy, and our subject, not manual, but natural powers, we consider chiefly those things which relate to gravity, levity, elastic force, the resistance of **fluids**, and the like forces, whether attractive or impulsive; and therefore we offer this work as mathematical principles of philosophy; for all the difficulty of philosophy seems to consist in this from the phenomena of motions to investigate the forces of nature, and then from these forces to demonstrate the other phenomena...

— Preface (Philosophiae Naturalis Principia Mathematica (1687))

Vacuum stands and remains a mathematical space. A cube placed in a vacuum would not displace anything, as it would displace air or water in a space already containing those **fluids**.

— Roger Bacon,

We shall see that the mathematical treatment of the subject [of electricity] has been greatly developed by writers who express themselves in terms of the 'Two **fluids**' theory. Their results, however, have been deduced entirely from data which can be proved by experiment, and which must therefore be true, whether we adopt the theory of two **fluids** or not. The experimental verification of the mathematical results therefore is no evidence for or against the peculiar doctrines of this theory.

— James Clerk Maxwell (1873)

Water and air, the two essential **fluids** on which all life depends, have become global garbage cans.

— French conservationist, naval officer, author and filmmaker

Any residents not burned alive in the fires or drowned in the flood will be made to drink a mixture of bodily **fluids** typically deposited in on the streets during Mardi Gras until death. The mixture should consist of (but is not limited to) sweat, snot, urine, saliva, tears, vomit, sexual **fluids**, and feces and santorum.

— James, Austen (2008).

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