VOL. XLIX.] PHILOSOPHICAL TRANSACTIONS. 60Q 



400 feet, like a river, which overflowed the adjoining fields, and actually con- 

 tinues with the same course, having extended itself about 2 miles, and seeming 

 to threaten the neiglibourhood. 



XXXir. Of the Ckarr Fish in North Wales. By the Rev. Mr. Farringlon, 

 cf Dinas, near Caernarvon, p. 210. 



This species they call torgoch, or red belly. This redness in the female, paler 

 or deef)er according to the season, resembles that of the fins of a roach, a fish 

 very common in many rivers of England, though we have none of them in this 

 country. The male is not adorned with that beautiful hue, yet he is finely 

 shaded, and marbled on the back and sides with black streaks, on a kind of pel- 

 lucid light sky-coloured ground. The shape is like a trout, but much more 

 elegant and delicate. Three lakes or large pools, at the foot of Snowden, afford 

 being and subsistence to this remarkable finny race. There is a communication 

 between them. About a fortnight in December the charrs make their appear- 

 ance; never wandering far from the verge of these lakes, or the mouths of the 

 rivers issuing from them ; but traverse from one end to the other, and from shore 

 to shore indifferently, or perchance as the wind sits, in great bodies; so that it 

 is a common thing to take in one net, 20 or 30 dozen in a night, at this place; 

 though not above 10 or a dozen fish in all at any other. Thus in winter frosts 

 and rigours, they sport and play near the margins of the flood, and probably de- 

 posit their spawn ; but in the summer heats they keep to the deep and centre of 

 the water, abounding in mud and large stones, as the shoaler parts do with gravel. 

 After Christmas they are seen no more till the following year. 



XXXV. A Method proposed to restore the Hearing, when injured by an Ob- 

 struction of the luba Eustachiana. By Mr. J. fVathen, Surgeon, p. 213. 



Whatever obstructs that passage leading from the ear into the nose, called 

 tuba eustachiana, so as to hinder the ingress of the air through it into the cavity 

 of the tympanum, is universally deemed destructive to the sense of hearing. 

 Hippocrates observed, that in a quinsy of the fauces, the patient became deaf, 

 by its compressing and closing up this tube.* Many practical writers assert the 

 same to have happened from adjacent ulcers, &c.;-^ and Mr. W. had known a 

 swelled tonsil occasion deafness. This canal opens into the lateral and anterior 



• Coac. 1 1 . n. 35. 



t Haller in Boerhav. de audita, p. 380, and 4l6. Tulpius 1. n. 35, a tumore palati. Valsalva, 

 cap. V, p. go, a polypo. et ulcere (viz. a certain yeoman had an ulcer above the uvula, on the left 

 side, which communicated with, and corroded part of, the orifice of the left tuba eustachiana; 

 which, when he stopped with a tent dipped in medicine, he immediately lost bis bearing in that ear, 

 but recovered it as soon as the tent was taken out). — Orig. 



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