520 PHILOSOPHICAL TRANSACTIONS. [anNOI/OQ 



often bare-footed on the floor. Now supposing that these woolly particles 

 might have fallen into any spoon-meat thicker than ordinary, the person might 

 swallow it down without being aware of it. 



My reasons for guessing that these woolly particles should come out of a 

 stocking, and that it should be occasioned by the motion of the foot, are these : 

 I myself always wear heavy white woollen under-stockings, and I sleep in the 

 same; so that I can wear them three weeks together, as my feet are not apt to 

 be moist ; now having several times viewed the broken woollen particles, which 

 lie in a heap, as it were, cleaving together under the heel, and having also 

 singled out of them several fibres or threads of wool, to prove that they are 

 composed of little hairs, and these woolly particles exactly agreeing with those 

 that were sent to me, I could no longer doubt that the said woolly particles 

 were anywise different from those particles that were found in the heel of the 

 stocking. 



Concerning several Solid Bodies voided by Urine. By Mr. James Yonge of Ply- 

 mouth, F. R. S. N° 323, p. 420. 



Some doubts having arisen that Mr. Yonge had been imposed on, by the 

 woman whose case was mentioned in the foregoing two papers, he has collected 

 together a number of uncommon cases, as follows: 



The authors and accounts of such cases are numerous : Diemerbroeck, Anat. 

 lib. 1, c. 17 J mentions several of his own knowledge, and many more from 

 Plutarch, Langius, Alex. Benedictus, J. M. Hessius, J. Alexandrinus, N. Flo- 

 rentinus, P. Figraeus, and others ; that needles, lumps of fat, iron keys, roots, 

 seeds, nails, &c. have come away by urine. To these may be added, Tho. 

 Bartholinus, Act. Med. vol.2, obs. 125 ; vol. 3, obs. 68; vol. 5, obs. 57, 70. 

 As also in his Tr. deLact. Thorac. cap. 6, 9 ; Fabr. Hildanus, cent. 5, obs. 51 ; 

 who write of pins, &c. discharged by urine. But Dr. Fairfax writes of one more 

 surprising, viz. a leaden-bullet swallowed by a woman for the colic, was passed 

 with the urine some years after, incrustated with a gravelly, gritty, and stony 

 accretion, as mentioned in the Philos. Trans. N° 40. 



I was once assured by a Physician in the west part of Cornwall, that he knew 

 a woman who voided by urine a small plum-stone. But there happened at Loo, 

 in the same county, a more surprising accident of that sort, viz. 



Nathaniel Mitchel, about 50 years of age, was in the summer of 169O seized 

 with violent colicky pains, which he mitigated by clysters, but could not per- 

 fectly free himself of them. About Michaelmas itigi, his pains being very 

 violent, he was relieved by the same remedy, and by the persuasion of a skilful 

 woman, he drank the powder of nettle-roots in white wine ; after the first or 



