Art. V. 2.2.1. REVERTENTIA* 7 i 



from quiefcence, afflict thefe patients, as the hemicrania, which 

 has erroneoufly been termed the clavus hystericus ; but which is 

 owing folely to the inaction of the membranes of that part, like 

 the pains attending the cold fits of intermittents, and which fre- 

 quently returns like them at very regular periods of time. 



Many of the above fymptoms are relieved by mufk, caftor s 

 the foetid gums, valerian, oleum animale, oil of amber, which 

 act in the ufual dofe without heating the body. The pains, 

 which fometimes attend thefe conftitutions, are relieved by the 

 fecernentia, as eflential oils in common tooth-ach, and ballam of 

 Peru, in the flatulent colic. But the incitantia., as opium, or 

 vinous fpirit, reclaim thefe morbid inverted motions with more 

 certainty than the fcetids ; and remove the pains which attend 

 thefe conftitutions, with more certainty than the fecernentia 3 

 but if given in large dofes, a debility and return of. the hyfteric 

 fymptoms occurs, when the effect of the opium or alcohol ceafes. 

 Opiates and fcetids joined feem belt to anfwer the purpofe of 

 alleviating the prefent fymptoms j and the forbentia, by ftimu- 

 lating the lymphatics and lacleals into continued adf ion, prevent 

 a relapfe of their inverfion, as Peruvian bark, and the ruft of 

 iron. See Clafs I. 3. I. 10. 



II. Vomiting confifts in the inverted order of the motions 

 of the ftomach, and cefophagus ; and is alfo attended with the 

 inverted motions of a part of the duodenum, when bile is eject- 

 ed ; and of the lymphatics of the ftomach and fauces, when 

 naufea attends, and when much lymph is evacuated. Perma- 

 nent vomiting is for a time relieved by the incitantia, as opium 

 or alcohol •, but is liable to return when their aclion ceafes. A 

 blifter on the back, or on the ftomach, is more efficacious for rc- 

 ftraining vomiting by their ftimulating into action the external 

 Ikin, and by lympathy affecting the membranes of the ftomach. 

 In fome fevers attended with inceffant vomiting Sydenham ad- 

 vifed the patient to put his head under the bed-clothes, till a 

 fweat appeared on the fkin, as explained in Clafs IV. 1. 1. 3, 



In chronical vomiting I have obferved crude mercury of good 

 effecl: in the dofe of half an ounce twice a day. The vomitings, 

 or vain efforts to vomit, which fometimes attend hyfteric or ep- 

 ileptic patients, are frequently inftantly relieved for a time by 

 applying flour of muftard-feed and water to the fmall of the 

 leg ; and removing it, as foon as the pain becomes considerable 

 If finapifms lie on too long, efpecially in paralytic cafes, they are 

 liable to produce troublefome ulcers. A plalter or cataplafpij 

 with opium and camphor on the region of the ftomach, will 

 fometimes revert its retrogade motions. 



III. Violent cathadis, as in diarrhoea or dyfentcry, h aftend- 

 Vol- I. W w w tui 



