XIV CONTENTS. 



PAGE 



Of ganglion cells with a straight and spiral fibre . . . . 194 



The views of Arnold and others . . . . . . . . 194 



Probable nature of the spherical and oval nerve-cells . . 196 



Nerve Action, 



Of the nerve current . . . . . . . . . . . . 197 



Of the chemical theory of the nerve current . . . . 199 



The vibratory theory of nerve action 200 



Experimental investigations inconclusive . . . . . . 200 



Fallacy of the argument based upon the excitability of 



nerve-fibres . . . . . . . . . . . . 201 



Fallacy of the argument deduced from the rate at which 



the nerve current travels . . . . . . . . 203 



Of the action of the bioplasm of nerve-fibres . . . . 204 



The probable action of the bioplasm of nerve . . . . 206 



The vital power of the highest bioplasm . . . . . . 208 



Muscular Tissue. 



Peculiar property of muscle 211 



" Protoplasm " of muscle .. .. .. .. .. 212 



Contractility and vital movements . . ..213 



Of studying the contraction of muscular tissue . . . . 214 



Two kinds of muscle .. .. .. .. .. .. 216 



Unstriped muscle 216 



Muscular fibre cells with three or more fibres . . . . 219 



Muscular fibre cells of the arteries . . . . . . . . 220 



Striated or striped muscle . . 220 



The bioplasm of muscle 222 



Formed material of muscle non-living . . . . . . 226 



Sarcolemma . - . . . . . . . . . . . . 228 



Of the junction of muscle with tendon . . . . . . 229 



Development of muscular tissue . . , . , . . . 229 

 Changes occurring in old muscular tissue. Fibrous de- 

 generation . . . . . . . . . . . . 231 



Fatty degeneration of muscle . . . . . . . . 232 



Distribution of Nerves to Muscular Tissue. 



Involuntary Muscle. 



Distribution of nerves to the bladder of the frog . . . . 236 



Striped Muscle. 



Of the dark-bordered nerve fibres distributed to voluntary 



muscle .. .. .239 



