332 PHILOSOPHICAL TRANSACTIONS. [aNNO I7O6. 



way, at some distance from Park-Snodiog. There are several deep holes and 

 trenches cut in the highways adjoining to the river Elwy, &c. and some of 

 them very large, which is attributed not so much to the overflowing of tiie river 

 as to the breaking out of springs in those very places. 



In Comb mountain there is a pit of a circular form, which in the summer 

 time used to have little or no water in it, and in winter as much water as would 

 swell the surface to about 14 or l6 yards over: but now in the midst of sum- 

 mer it rose up at least a yard and a half higher, than it was ever known to do in 

 the wettest winters ; and overflowing its banks, it fell down the hill with such 

 violence, as to penetrate into the very body of a rocky road, and dug pits in it, 

 so that the road, which was a common highway, is now become irreparable. 



Of a Tumour on the Neck, full of Hydatides, cured by Mr. Anthony Hewnden, 

 Surgeon : Communicated by Dr. Edw. Tyson, F. R. S. N° 308, p. 2344. 

 A gentlewoman in London, 25 years of age, had a large wenny tumour; the 

 basis, taking its origin from all the lower hinder part of the skull, stretches 

 down the neck near each jugular, extending itself almost as low as both the 

 scapulae; on the upper part was a phlegmon. The radix being so large, I ap- 

 plied a transverse caustic the whole length and breadth of the tumour, intend- 

 ing to separate the cutis from the membrane of the cystis; but it being so thin 

 where the phlegmon was, it obliged me to divide the cystis; out of which I 

 extracted above 6o hydatides, of the size of a small wallnut; and several more 

 were broken. These hydatides swam in a liquor of the consistence of the 

 whites of eggs. In this cystis I found a large quantity of atheromatous and 

 steatomatous matter, and at the basis a large sarcoma; the greatest part I cut 

 off^, but fearing to hurt the muscles of the neck, I deferred it to the next 

 dressing, intending to take away the rest of the sarcoma and the radix of the 

 cystis by caustics, which I applied without success; for they came off" without 

 making an eschar, the radix being of a cartilaginous substance; searching with 

 my probe to find some interstice, it dropped into one ; and touching some 

 membranous or nervous body, caused the patient to cry out furiously; into this 

 interstice I put a piece of Roman vitriol fitted to the place, which came out the 

 next day all dissolved, with some of the radix: by constantly applying the vitriol, 

 I extirpated the whole radix, and healed the part S. A. 



It is observable, 1. That 7 years before this operation, this tumour was very 

 nearly as large as at this time, and subsided of itself. 2. That when I began with 

 caustics, the first I used was praecip. rub. with which I covered the whole radix, 

 and it came oft' without any eschar, hut it salivated the patient for 3 weeks. 



