7 o 



BIOLOGICAL PHYSICS 



have been over-spread, inter-penetrated, and organically, or 

 texturally, arranged from centre to periphery. 



The component parts of the systemic nervous system, 

 cellular and fibrous, wherever distributed, are united into 

 one organism under the control of the highest and higher 



FIG. 4. THE CRANIUM OPENED TO SHOW THE FALX OF THE CEREBRUM 

 AND TENTORIUM OF THE CEREBELLUM, AND THE PLACES OF EXIT 

 OF THE CRANIAL NERVES. \. 



i, falx ; 2, superior longitudinal sinus ; 3, concave border of the falx ; 4, inferior 

 longitudinal sinus ; 5, base of the falx ; 6, straight sinus ; 7, anterior part of the 

 falx J 8, right side of the tentorium cerebelli, seen from below ; 9, lateral sinus ; 

 10, superior petrosal sinus; n, inferior petrosal sinus; 12, posterior occipital 

 sinus; 13, falx cerebelli; 14, 15, 16, 17, 18, second, third, fourth, fifth, and sixth 

 cranial nerves; 19, seventh and eighth nerves; 20, ninth, tenth, and eleventh 

 nerves ; 21, twelfth nerve ; 22, 23, first and second cervical nerves ; 24, upper 

 end of the ligamentum denticulatum. 



centres representing the peculiar, or central, haunt of the 

 neuro-vital principle, or life but are capable of exercising 

 functions determined and directed by the lower centres 

 for local, as distinguished from general and communal, 

 purposes. Studied in detail, each of these parts is found 

 to be composed of a multitudinous series of cells united 

 to each other by processes, either of continuity, or in 



