Class I. 2. 5. 6. OF IRRITATION. Uf 



and then repeatedly bringing their exterior edges into contact, 

 by which means very final] electric fparks become vihble in the 

 eyes. 



Mrs. T Lad for fome weeks complained of imperfect 



fiorht. For the laft fortnight fhe could not in lefs than a minute 

 fpell out a fingle word in a large print. Her eyes black, and the 

 pupils large. Very flight electric rhocks, not fparks, were palled 

 through the forepart of her forehead twice- a day, and the zinc 

 and filver pencils as mentioned below were ufed many times a 

 day. She to< k valerian and columbo internally, and regained her 

 fight very perfectly in about three weeks. 



I ufed in the above cafe a more convenient and eracacious 

 method of galvanifm by employing two rods, one of them of zinc 

 about the fize of a writing pencil, and the other a fiiver pencil- 

 cafe about the fame fize ; and by putting the end of the zinc 

 rod in contact with the external corner of one eye, and the end 

 of the filver pencil-cafe in contact with the external corner of the 

 ether eye, and then repeatedly making the other ends touch each.* 

 other ; ibarks will be viiibie in the eves both at the time of con- 

 tact and at the time of feparation of the two rods. This experi- 

 ment was pubhfhed by Volta fmce the former one by Galvani. 

 See Seef. XIV. 5. of Vol. I. 



A foreign phyucian, profefTor' Arnemann, has lately recom- 

 mended the production of vertigo in gutta ferena, as he fays, to 

 accumulate more blood in the head. If this fhould be really 

 found of advantage the patient might lie on a large mill-fione, 

 which might be fufrered to turn ilowly, but a very great velocity 

 of the whirling (lone mi^ht occafjon ilceo, anoplexv, and death. 

 See Snpl. I. 15. 7. 



M. M. Minute electric {hocks. A grain of opium, and a 

 quarter of a grain of corrofive fublimate of mercury, twice a day 

 for four or fix weeks. Blilter on the crown of the head. Er- 

 rhines, fo as to induce violent fneezing twice a day for a week. 



6. Aud'itus imminutus. Diminiihed hearing. Deafnefs is a 

 frequent fymptom in thofe inflammatory or feniltive fevers with 

 debility, which are generally called putrid ; it attends the general 

 ftu; or in thofe fevers, and is rather efteemed a falutary fign, as 

 during this ftupor there is lefs expenditure of tentorial power. 



In fevers of debility without inflammation, called nervous fe- 

 vers, I fufpedt deafnefs to be a bad fymptom, anting, like the di- 

 lated pupil, from a partial paralyfis of the nerve of fenfe. See 

 Glafs IV. 2. 1. 15. 



Nervous fevers are fuppofed by Dr. Gilchrift to originate from 

 a congeition of ferum or water in fome part of the brain, as many 

 of the iymptorus are fo fim/Jar to thofe of hydrocephalus inter- 



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