ON CEREBRO-SPINAL LYMPH 



75 



of the skin, while to a third, we may infer, belong the 

 sebaceous glands of the skin, as well as some of the 

 glandular structures distributed throughout the intestinal 

 canal and elsewhere. In the last mentioned may some- 

 times be included the pituitary gland and nasal mucosa, 

 because their functions are regulated and determined by 

 the consistency of the materials supplied to them for the 



FIG. ii. RIGHT HALF OF THE BRAIN DIVIDED BY A VERTICAL ANTERO- 

 POSTERIOR SECTION (from various sources and from nature). (Allen 

 Thomson.) . 



1.2, 3, 3<z, 3^, are placed on convolutions of the cerebrum ; 4, the fifth ventricle, and 

 above it the divided corpus callosum ; 5, the third ventricle ; 5', pituitary body ; 

 6, corpora quadrigeniina and pineal gland; +, the fourth ventricle; 7, pons 

 Varolii ; 8, medulla oblongata ; 9, cerebellum ; I, the olfactory bulb ; n, the right 

 optic nerve ; m, right third nerve. 



time being. Thus we see that the olfactory mucosa 

 during the prevalence and progress of a catarrh, some- 

 times discharges a fluid, sometimes a viscid material, and 

 sometimes a compound of both. 



Therefore should the physiological balance in con- 

 sistency and means of exit of this fluid the cerebro-spinal 

 be to any considerable extent, or for any lengthened 

 period disturbed, it becomes self-evident that the end 

 must be a pathological condition, characterised as to 

 incidence, and nature, according as the disturbance 



