7 8 BIOLOGICAL PHYSICS 



by ordinary transpiration and perspiration, both general 

 and local. 



In other words, the process of excretion of nerve debris 

 would seem to us, on continuing the study of its 

 mechanisms, to be affected through several channels in 

 particular, and through the nerve endings, motor and 

 sensory, in general, the particular channels being the 

 olfactory tracts and nerves, the glosso-pharyngeal, or 



FlG. 12. VIEW OF THE ANTERIOR SURFACE OF THE PONS VAROLII AND 

 MEDULLA OBLONGATA, WITH A SMALL PARTICLE OF CORD ATTACHED. 



a, a, pyramids; b, their decussation ; c, c, olives; d, d, restiform bodies; e, external 

 arciform fibres, curving round the lower end of the olive ; f, fibres described by 

 Solly as passing from the anterior column of the cord to the cerebellum ; g, 

 anterior column of the spinal cord ; k, lateral column ; /, pons Varolii ; z", its 

 upper fibres ; v, v, roots of the fifth pair of nerves. 



pituitary, excretory mechanism, and the coccygeal gland 

 and associated structures, with, it may be, the axillary 

 glands, so far as they are related to the systemic nervous 

 system and certain cutaneous surfaces, particularly between 

 the toes and fingers ; the odoriferous qualities of the excre- 

 tion in these latter regions, howsoever produced, whether 

 from haemal, or neural, sources, or both, pointing to high 

 toxicity, and the consequent necessity for its immediate 

 elimination from the system, or before it has had an 

 opportunity of rejoining and contaminating the returning 

 haemal lymph streams. 



