INDEX. 



ACCELERATION, in attraction constant, in repulsion variable, 60 



ACRE an imaginary centre of Dynasties, 260-276 



Airy's Explanation of, directly as the mass, 51 



Animal tripartite membrane, 6, 82 



Animals and Vegetables, distinction between, 9, 141 



Antagonism essential to demonstrate force, 38 



Apology for brevity, 9 



for the introduction of Anthropology, 26, 284 

 ASSOCIATION, a principle of action in present era, 25, 278 

 Astronomy, by the Ancients, in relation to Longevity, 221 

 Atoms permeated by two fluids unequally, 55 



Atoms have a fixed form, 61 



Attraction and Repulsion of unequal Acceleration, 2, 47 



directly as the mass often misunderstood, 39 



, equal, opposed to Chemical Affinity, 4, 40 



Similar and Eclectic, 64 



Attractive force fixed, Repellent accumulative, 4, 53 

 Axoidal and Orbital Motion require active forces, 2, 45 



BARK of trees in relation to the leaf, 138 

 Bennett's, Dr. J. H., ideal notion of Vital Force, 37 

 Black-death, a graft upon Plague, 18 

 , by Hecker, 185 



and Plague a hybrid disease, 189 



Blood-letting, its decline and fall, 234 



Boyle's Experiment under the air-pump indecisive, 41 



Brain and Spinal Chord, metamorphosed muscle, 88, 123 



a Concentrating Organ, 123 

 centre of a series of limbs, 123 



, its use in relation to the senses, 130 



, Reasons for judging it to be metamorphosed muscle, 135 

 , Senses after leaving the, have each a proper sense apparatus, 105 



