328 



Structure, 20 



cellular, 53 



chemical, 53 



and function, 50 



mechanisms, 52 



microscopical, 53 



morphological, 51 



patterns of, 20, 50 



ultramicroscopical, 53 



unessential, 51 

 Sublimation, 158 

 Substance, 128 

 Suctorial organs, 72 

 Swimming, 70 

 Symmetry, of organisms, 33 

 Synapses, no 

 Systems, geological, 296 



isolated, 100 



Taste, 118 



Taxis, 142 



Temperature sensation, 118 



Tentacles, 44 



Things, classes of, 6 



Tidal friction, 16 



Time, 121 



INDEX 



Tissues, 48 



Touch, 118 



Transformations, energy, 63, 213 



Transformers, 63 



Transformism, 242 



hypotheses of, 253, 259 

 Trial and error, 151 

 Tropisms, 141 

 Truth, 129, 159 

 Tunicates, 39 



Unicellular organisms, 30 

 Unit-characters, 237 



Variability, 243, 255 



analysis of, 244 



mathematical, 127 



mendelian, 244 

 Vertebrates, 40 

 Vertigo, 118 

 Vision, 117 



Weismannism, 208, 231 

 Worms, 37 



Zooids, 35 



