.ART. III. 2. 7. i. SECERNENTIA. 39 



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

 faid to have the fame eticct. 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 pollibly affect the mucous glands of the urethra like 

 cantharides. See Impotemia, Clafs 2. 2. 3. 



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

 and fpinctcr ani, producing tenefmus and piles. Externally in 

 clyfters or fuppodtories, common fait feems to act on that bow- 

 el with greater certainty. But where the thread worms or afcar- 

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

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

 three months, has frequently destroyed them. Might not the 

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

 See: Clafs I. i. 4. 14. , 



VIII. The external application of cantharides by (Emulating 

 the excretory duds 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. 



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

 the fkin many minutes is liable to produce a Hough and confe- 

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

 plied to cold extremities. Volatile alkali properly diluted might 

 Stimulate the fkin without inducing ftrangury. 



IX. The mild errhincs 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 

 fubltances to the eye ; or acrid vapours, which Stimulate the 

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

 the noftrils, and Simulating the excretory duct of the lachrymal 

 fack, as treated of in the Section on Inftinct. 



Or the fecretion of tears is increafed by the aflbctatidn of the 

 motions of the excretory duel of the lachrymal fack with ideas 

 of tender pleafure, or of hooclcfs diilrefs, as explained in Sect. 

 XVI. 8 2. and 3. 



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

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



VOL. I. R R r quantity 



