Class I, i. 5. 9. OF IRRITATION. 49 



A lady after a bruife on her nofe by a fall was affected with 

 inceflant fneezing, and relieved by muffing ftarch up her noftrils. 

 Perpetual freezings in the mealies, and in catarrhs from cold, 

 are owing to the ftimulus of the faline part of the mucous effu- 

 fion on the membrane of the noftrils. See Clafs II. 1. 1. 2. 



9. Pruritus. Itching feems to be a greater degree of titilla- 

 tion, and to be owing to the ftimulus of fome acrid material, as 

 the matter of the itch ; or of the herpes on the fcrotum, and 

 about the anus *, or from thofe universal eruptions, which attend 

 fome elderly people, who have drunk much vinous fpirit. It 

 occurs alfo, when inflammations are declining, as in the healing 

 of blifters, or in the cure of ophthalmia, as the action of the vef- 

 fels is yet fo great as to produce fenfation ; which, like the titil- 

 lations that occafion laughter, is perpetually changing from pleaf- 

 ure to pain. 



When the natural efforts of fcratching do not relieve the pain 

 of itching, it fometimes increafes fo as to induce convulfions and 

 madnefs. As in the furor uterinus, and fatyriafis, and in the 

 fphincter ani and fcrotum. See Clafs II. 1.4. 14. IV. 2. 2. 6. 



M. M. Warm bath. Fomentation. Alcohol externally. 

 Poultice. Oiled filk. Mercurial ointments on fmall furfaces at 

 once. See Clafs II. 1. 4. 12. Solutions of lead on fmall fur- 

 faces at once. 



10. Dolor urens. Smarting: follows the edge of a knife in ma- 

 king a wound, and feems to be owing to the diftention of apart 

 of a fibre, till it breaks. A fmarting of the ikin is liable to af- 

 fect the fears left by herpes or fhingles ; and the callous parts of 

 the bottoms of the feet ; and around the bafes of corns on the 

 toes ; and frequently extends after fciatica along the outlkle of 

 the thigh, and of the leg, and part of the foot. All thefe may 

 be owing to the ftimulus of extenfion, by blood or ferum being 

 forced into veffels nearly coalefced. 



M. M. Emplaftrum de minio put like a bandage on the part. 

 Warm fomentation. Oil and camphor rubbed on the part. Oil- 

 filk covering. A blifter on the part. Ether, or alcohol, differ- 

 ed to evaporate on the part. 



1 1 . Conjlernatio. Surprife. As our eyes acquaint us at the 

 fame time with left than half of the objects, which furround us, 

 we have learned to confide much in the organ of hearing to warn 

 us of approaching dangers. Hence it happens, that if any found 

 ftrikes us, which we cannot immediately account for, our fears 

 are inftantly alarmed. Thus in great debility of body, the loud 

 clapping of a door, or the fall of a fire-ftiovel, produces alarm, 

 and fometimes even convulfions ; the fame occurs from unex- 

 pected fight. 7 ., and in the dark from unexpected objects of touch. 



Vol. L r . H In 



