146 PHILOSOPHICAL TRANSACTIONS. [anNO 1685. 



^n Abstract of a Letter from Dr. Sam. Threapland, of Hallifax, to Dr. Plott, 

 giving an Account of Stones voided by Siege. N° 1 70, p. 961. 



A carpenter, about 40 years of age, of a strong habit of body, and very 

 laborious in his calling, came to me about 3 weeks since, and made great com- 

 plaint of the torture he had suffered by reason of two stones he had voided by 

 stool last Christmas, there being about 14 days time between. He perceived no 

 alteration or disturbance in his body, till within 5 or 6 days that the first came 

 away ; then he began to complain very much of a pain in the belly, much re- 

 sembling the colic, and of a stoppage in the intestines, not much unlike that 

 in a tenesmus, having frequent provocations to go to stool, but to no purpose 

 on trial. He took little or no rest in all that time; his stomach retained scarcely 

 any meat or drink it received ; till in the conclusion one of the stones came into 

 the intestinum rectum, where it lodged for about a day ; then coming within 

 the reach of his finger, he drew it out by force, and presently after he was well 

 again ; and so continued for a fortnight, till the other began to move ; which 

 occasioned a pain beyond the former in proportion to its bulk, being larger, and 

 kept him in torment about 8 days ; during which time, there was an absolute 

 suppression of excrements ; and when the stone came into the rectum, it con- 

 tinued near 2 days within the reach of his finger, with which he could not draw 

 it out by any means ; till at length he bent a small piece of iron into the form 

 of a hook, with which rude instrument his servant drew it out with much ado, 

 and not without wounding the rugous coat of that part. After that he soon re- 

 covered his former condition, and felt no further harm from this accident. 

 About 7 years before, the very like case had befallen him, voiding 2 stones after 

 the same manner, and about the same size. 



Concerning the Salts of Wine and f'lnegar, &c. By M. Anthony Leewenhoeck 



F.R.S. N° 170, p. 963. 



Having found my yearly provision of vinegar, which had been about 3 months 

 in the cellar, to be more sour than ordinary, I left it open to the air during 

 some hours, at which time I observed a great many particles, which I call the 

 salt of the vinegar, as N° 1, fig. A, pi. 4, tapering towards each end, and 

 having in the middle a long brownish figure : others of the same extent, as 

 fig. B, being as clear as crystal ; and these were the most numerous : others 

 being long and brownish, having in the middle of them a bright clear substance, 

 as fig. C. In another place were some few oval figures, within which were 

 contained some lesser ovals, as fig. D. Under the aforesaid figures. A, B, C, 



