xiv CONTENTS. 



SECTION XII. 

 THE LYMPHATIC ARRANGEMENTS OF THE BRAIN AND SPINAL CORD. 



PAGE 



693. The membranes of the brain and spinal cord 1125 



694. The sources of the cerebrospinal fluid j 1126 



695. The characters of the cerebrospinal fluid 1128 



The renewal of the cerebrospinal fluid. The purposes served by the 



fluid 1129 



SECTION XIII. 



THE VASCULAR ARRANGEMENTS OF THE BRAIN AND SPINAL CORD. 



697. The distribution and characters of the arteries of the brain . . 1131 

 698. The venous arrangements of the brain ; the venous sinuses . . 1133 

 699. The supply of blood to the brain relatively small. The methods of 



investigating the circulation of the brain 1134 



700. The supply of blood to the brain modified by the respiration and by 



changes in the general arterial pressure. The want of clear proof 



of special vasomotor nerves for the cerebral arteries . . . 1136 

 701. The flow of blood through the brain nevertheless influenced by 



changes taking place in the brain itself 1138 



