SECT. XXXIII. 2. 10. OF SENSATION. 317 



to thofe in the preceding experiment, I (hall not relate them 

 minutely. 



" Experiment 3d October 2oth. Blood was taken from a 

 perfon who had the ftnall-pox, on the third day of the eruption, 

 and on the fixth from the commencement of the eruptive fever, 

 I introduced fome of it in its fluid (late into both arms of a boy 

 feven years old. 21. There appeared to be fome inflammation 

 under the cuticle, where the punctures were made. 22d. In- 

 flammation more confiderable. 23d. On this day the inflamma- 

 tion was fomewhat greater, and the cuticle rather elevated. 



" 24th. Inflammation much lefs, and only a brown or orange- 

 colour remained. 25th. Scarely any difcoloration left. On 

 this day he was inoculated with variolous matter, the progrefs of 

 the infection went on in the ufual way, and he had the fmall- 

 pox very favourably. 



" At this time I was requefted to inoculate a young pefojn, 

 who was thought to have had the fmall-pox, but his parents were 

 not quite certain , in one arm I introduced variolous matter, and 

 in the other blood, taken as in experiment 3d. On the fecond 

 day after the operation, the punctured parts were inflamed, 

 though I think the arm in which I had inferted variolous mat- 

 ter was rather more fo than the other. On the third the inflam- 

 mation was increafed, and looked much the fame as in the pre- 

 ceding experiment. 4th. The inflammation was much dimin- 

 ifhed, and on the 5th almoftgone. He was expofed at the fame 

 time to the natural infection, but has continued perfectly well, 



" I have frequently obferved (and believe moft practitioners 

 have done the fame), that if variolous matter be inferted in the 

 arm of a perfon who has previouily had the fmall-pox, the in- 

 flammation on the fecond or third day is much greater, than if 

 they had not had the difeafe, but on the fourth or fifth it dif- 

 appears. 



" On the 23d I introduced blood into the arms of three more 

 children, taken on the third and fourth days of the eruption. 

 The appearances were much the fame as mentioned in experi- 

 ments firft and third. -They were afterwards inoculated with 

 variolous matter, and had the difeafe in the regular way. 



" The above experiments were made with blood taken from 

 a fmall vein in the hand or foot of three or four different patients, 

 whom I had at that time under inoculation. They were fele&- 

 edfrom 160, as having the greateft number of puftules. The 

 part was wafhed with warm water before the blood was taken, 

 to prevent rhe,poffibility of any matter being mixed with it from 

 the fuvface." 



Shall we conclude from hence, that the variolous matter never 



enters 



