ct. XXXIII. 2. 10. OF SENSATION. 317 



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

 minutely. 



« Experiment 3d. October 20th. Blood was taken from a 

 perfon who had the fmall-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 o-ld. 21. There appeared to be fome inflammation 

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

 flammation more considerable. 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. Scarcely any difcoloration left. On 

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

 the infe£tion went on in the ufual way, and he had the irnali- 

 pox very favourably. 



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

 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- 

 ilhed, and on the 5th almoft gone. He was expofed at the fame 

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



" I have frequently obferved (and believe molt practitioners 

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

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

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

 they had not had the diieafe, but on the fourth or fifth it dii- 



" 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 fir ft 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 

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

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

 ed from 160, as having the greateft number of puflules. The 

 part was wathed with warm water before the blood was taken. 

 Id prevent the poilibiiity of any matter being mixed with it from 

 he furface." 



Shall we conclude from hence, that the variolous matter never 



enters 



