58 PHILOSOPHICAL TRANSACTIONS. [anNO 1756. 



are rather clissolved , which is the more remarkable. The same effects are ob- 

 served on pieces of the hardest cheese, which swell in these waters, and are 

 changed into a kind of poultice. 



In the treatise before us, the author has given the detail of many experiments, 

 which prove the solvent power of these waters. Dr. W. lays a few of them only 

 before the Society, from which an opinion both of the author's exactness in 

 making them, as well as how far he is justified in his conclusions, may be 

 formed. And here Dr W. observes, which should be a very comfortable con- 

 sideration for the inhabitants in these parts, that the author has been obliged 

 frequently to suspend his researches for want of human calculi, which is a dis- 

 ease exceedingly rare in Bohemia. 



June 20, 1749, a stone of a brown colour, which weighed near 24. oz. 

 was placed in a China basin near that source, which is called Prudel, in such a 

 manner, as to be continually covered with the warm water. On the next day 

 the external crust began to grow soft , on the 3d you might make an impression 

 on it with your nail, as upon cheese ; on the 4th and 5th, it was dissolved to the 

 nucleus ; on the 6th, the nucleus itself was dissolved, and in the bottom of the 

 basin there was left a white viscid mass, like poultice, or newly steeped cheese : 

 this was impalpable between the fingers. In this time the basin was incrusted 

 with a very hard tophaceous mass, of the thickness of a quill. Certain calculi, 

 not larger than peas, were dissolved thoroughly, some in one day, and the 

 rest in two. 



1750, June 12, a stone weighing more than -|-oz. was placed in the same 

 manner as the former, and not a grain of it remained on the 4th day. At this 

 time a clergyman, who was in a course of these waters for gouty complaints, 

 voided 6 stones, all which were dissolved in the same manner. 



A nobleman, who was afflicted with bloody urine, from calculi in the kidneys, 

 came to Carlsbad for the relief of his complaints ; and brought with him some 

 small calculi, which he had voided a few years before. By Dr. Lieberkuhn's 

 advice Dr. Springsfeld divided these calculi into 4 equal parts, each of which 

 weighed 6 grs. One part of these was infused in the water of the source called 

 Prudel ; the 2nd, in the new spring ; the 3d, in that near the mill. In 1 2 hours 

 the first part had lost 5 grs. the 2nd, 4 grs. and the 3d, only I gr. The 4th 

 portion was put upon a linen rag, which was stretched over the bottom of a 

 funnel. Into this funnel the nobleman was directed to make water every day 

 before dinner, after his having drank his quantity of Carlsbad water. On this, 

 these calculi, after 8 days, had lost 2-3ds of their weight ; viz. 4 grs. It must 

 be here remarked, that this nobleman, during, the regimen, voided several small 

 palculi, which he had not done for some years. A larger quantity of bloody 

 urine than usual attended the parting with these stones ; but this continued only 

 2 or 3 days, and afterwards went quite off; and this nobleman from that time 



