Art. til. 2. 7. r. SECERNENTIA. 39 



fuch dofes as to induce the ftrangury. Spirit of turpentine is 

 faid to have the fame effect. I have given above a dram of it 

 twice a day floating on a glafs of water in chronic lumbago with- 

 out this effect, and the patient gradually recovered. Phofpho- 

 rus may poiTibly affect the mucous glands of the urethra like 

 cantharides. See Impotentia, Clafs II. 2. 2. 3. 



VII. Aloe given internally feems to act chiefly on the rectum 

 and fphincter ani, producing tenefmus and piles. Externally in 

 clyfters or fuppofitories, common fait feems to act on that bow* 

 el with greater certainty. But where the thread worms or afd&r- 

 ides exift, 60 or 100 grains of aloes reduced to powder and 

 boiled in a pint of gruel, and ufed as a clyfter twice a week for 

 three months, has frequently deftroyed them. Might not the 

 hairs of filiqua hirfuta be ufed in an injection for this purpofe ? 

 See Clafs I. 1.4. 14. 



VIII. The external application of cantharides by ftimulating 

 the excretory ducts of the capillary glands produces a great fe- 

 cretion of fubcutaneous mucus with pain and inflammation ; 

 which mucaginous fluid, not being able to permeate the cuticle, 

 raifes it up ; a fimilar fecretion and elevation of the cuticle is 

 produced by actual fire ; and by cauftic materials, as by the ap- 

 plication of the juice of the root of white briony, or bruifed muf- 

 tard-feed. Experiments are wanting to introduce fome acrid 

 application into practice inftead of cantharides, which might not 

 induce the ftrangury. 



Muftard-feed alone is too acrid, and if it be fuffered to lie on 

 the fkin many minutes is liable to produce a flough and confer 

 quent ulcer, and mould therefore be mixed with flour when ap- 

 plied to cold extremities. Volatile alkali properly diluted might 

 flimulate the fkin without inducing ftrangury. 



IX. The mild errhines are fuch as moderately ftimulate the 

 membrane of the noftrils, fo as to increafe the fecretion of 

 nafal mucus ; as is feen in thofe, who are habituated to take 

 fnuff. The ftronger errhines are mentioned in Art. V. 2. 3. 



X. The fecretion of tears is increafed either by applying acrid 

 fubftances to the eye ; or acrid vapours, which ftimulate the 

 excretory duct of the lachrymal gland ; or by applying them to 

 the noftrils, and ftimulating the excretory duct of the lachrymal 

 fack, as treated of in the Section on Inftinct. 



Or the fecretion of tears is increafed by the aftbciation of the. 

 motions of the excretory duct of the lachrymal fack with ideas 

 of tender pleafure, or of hopelefs diftrefs, as explained in Sect. 

 XVI. 8. 2. and 1. 



XI. The fecretion of fenforial power in the brain is proba- 

 bly increafed by opium or wine, becaufe when taken in certairt 



Vol- I. R r r quantity 



