CONTENTS. 



Xlll 



PAGE 



Of the -bioplasm of bone . . . . . . . . . . 148 



Formation of lacunse . . . . . . . . . . . . 149 



The otfslioots do not correspond to the canaHculi. . . . 152 



Of the changes beneath the periosteum and medullary 



membrane. . . . . . . . . . . . . . 153 



Transplantation of periosteum . . . . . . . . 153 



Of the medulla or marrow of bone . . . . . . . . 154 



Of the marrow cells or myeloid cells and of tbe formation 



of the plates and spicules of cancellated tissue . . 154 

 Of the changes oecmn-ing in an Haversian system of fully 



formed bone . . . . . . . . . . . . 155 



Formation of primary bone . . . . . . . , . . 158 



The disintegration and removal of bone . . . . . . 1 59 



Origin of the disintegrating bioplasts . . . . . . 160 



Of the manner in which the removal of tbe bone is effected 160 



Reparation of bone . . . . . . . . . . . . 162 



Inflammation of bone. • . . . . . . - . . . . 162 



E-ickets and caries . . . . . . . . . . . . 163 



Of the death of bone . . . . . . . . . . . . 164 



Of ii'ritation and excitation . . . . . . . . . . 165 



Of Nerve Fibres. 



Importance of bioplasm in Mgliest tissues . . . . . . 167 



Nerve tissue in the lowest organisms . . . . . . 168 



Irreconcileable opinions concerning tbe structure and ac- 

 tion of a nerve apparatus . . . . . . . . 170 



The active part of a nerve-fibre . . . . . . . . 170 



Fine nerve-fibres compound. . . . . . . . . . 171 



No ends to be demonstrated, . . . . . . . . . 172 



Of plexuses and terminal networks . . . . - . . . . 174 



Dark-bordered nerve-fibres . . , . . . . , . 175 



Of the jjale nerve-fibres of the sympathetic system . , 176 



Fine fibres running with tlie dark-bordered nerve-fibres . . 176 



Of the axis cylinder . . . . . . . . . . . . 177 



Advantages of the subdivision and interlacement of nerve- 

 fibres . . . . . . . . . . . . . . 177 



Fundamental and essential characters of a nervous system 178 



The course and distribution of nerve-fibres. . . . . . 182 



Of Nerve Centres. 



Central nerve-ceUs 



Angular or caudate nerve-cells 



Bioplasm of the nerve-cell . . 



Of the spherical, oval, and pyriform nerve-ceUs . . 



185 

 186 

 190 



100 



