Class II. i. 3. 11. OF SENSATION. 209 



alfo change of air is of material confequence, and often removes 

 the cough like a charm, as mentioned in a limilar iituation at 

 the end of the chih-cough. 



Rubeola inirritatq. Meafles with inirritated fever, or with 

 weak pulfe, has been fpoken of by {ome writers. See London 

 Med. Obferv. .Vol. IV. Art. XI. It has alfo been laid to have 

 been attended with fore throat. Edinb. Effays, Vol. V. Art. II. 

 Could the fcarlet fever have been miftaken for the meafles ? ...>r 

 might one of them have fucceeded the other, as in the mealies 

 and fni all-pox mentioned in Seel. XXXIII. 2. 9, ? 



From what has been laid, it is probable that inoculation might 

 difarm the mealies as much as the fmall-pox, by preventing the 

 catarrh, and frequent pulmonary inflammation, which attends 

 this difeafe ; both of which are probably the confluence of 

 the immediate application of the contagious miafmata to thefe 

 membranes. Some attempts have been made, but a difficulty 

 feems to arife in giving the difeafe ; the blood, I conjecture, 

 would net infect, nor the tears; perhaps the mucous discharge 

 from the noitriis might fucceed ; or a drop of warm water put 

 on the eruptions, and fcraped orr again with the edge of a lan- 

 cet ; or if the branny fcales were collected, and moiftened with 

 a little warm water ? Further experiments on this fubjecr. woi 

 be worthy the public attention. 



1 1. Scarlatina mitis. The fcarlet fever exiils with all degrees 

 of virulence, from a flea-bite to the plague. The infectious 

 material of this difeafe, like that of the fmall-pox, I fuppofe to 

 be diffufed, not dijflblved, in the air ; on which account I fuf- 

 pecvt that it requires a much nearer approach to the fick for a 

 well perfon to receive the infection, than in the meafles ; the 

 contagion cf which I believe to be mere volatile, or diffuiibje, 

 in the atmofpherc. But as the contagious miafm ita of fmall- 

 pox and fcarlet fever are fuppofed to be more fixed, they may 

 remain for a longer time in clothes or furniture ; as a thread dip- 

 ped in variolous matter has given the difeafe by inoculation after 

 having been expofed many days to the air, and after having been 

 kept many months in a phial. This alio accounts for the flow or 

 fporadic progrefs of the fcarlet fever, as it infetts others at but 

 a very fmall diftance from the fick ; and does not produce a 

 quantity of pus-like matter, like rhe fmall-pox, which can ad- 

 here to the clothes of the attendants, and when dried is liable 

 to be fhaken oif in the form of powder, and thus propagate the 

 infection. 



This contagious powder of the fmall-pox, and of the fcarlet 

 fever, becomes mixed with faliva in the mouth, arul is thus car- 

 ried to the tonfils, the mucus of which arrefts fome particles of 



Vol. II. D d tV-s 



