OBSERVATIONS ON PILARIS. 65 



First — The rapidity of the current is diminished in the recum- 

 bent posture, and {in women and children at least) still further 

 during sleep. It seems probable that there may also be an integral 

 change in the relation of the red and white corpuscles approaching 

 that which takes place when the circulation is retarded in the web 

 of a frog's foot. This modification of the internal constitution of 



the main current mnv onnsp tho Wilnvim +r» nrlliprp \r\ flip «iflp<a of 



an( 



DIRECTION TO BINDER. 



Pages 65-6 and 81-2 of the last number are to be cancelled. 

 1 their places supplied by those reprinted herewith. 



L^_'VJC^lU^v/l^ \Ji. ujav> j.' 



Third — The temperature of the blood is probably lower, relatively 

 to that of the tissues (or it may be higher) during sleep than in 

 the alternative state, consequent on the presence, or absence, of 

 special elements derived from the food. 



It does not seem likely that there can be any considerable change 

 of condition consequent upon the periodic or occasional discharge of 

 lymph and chyle into the blood ; but it may happen that when the 

 circulation is slow and the body lies recumbent, the parasites are 

 thrown into the main current and therefore appear in greater 

 numbers. It is premature to speculate on the causes of a pheno- 

 menon which may yet prove to be exceptional, but if the conclusion 

 arrived at should be maintained, it will certainly be the duty of 

 physiologists to pursue further into detail, than they have ever yet 

 been carried, certain neglected inquiries as to the altered conditions 

 of the blood during sleep, and when the brain and body are awake. 



