VOL. XXII.l PHILOSOPHICAL TRANSACTIONS. 545 



the tangent; therefore the curve required is of such a nature, that its subtan- 

 gent is to the tangent, as /« to \^y. Now every cycloid has this property, 

 since it is known that the tangent of the cycloid is parallel to the chord of the 

 conterminous arc of the generating circle, whose diameter is a, and whose 

 vertex is considered as downward. And with equal facility may the i ve of 

 swiltest descent be determined, for any other hypothesis of gravity. 



Concerning a triple Bladder, &c. By M. Bussiere. N° 268, p. 752. 



If the bodies of such as die of extraordinary distempers were often opened, 

 it might sometimes be found that those effects which were attributed to the 

 alteration of the blood or humours, depend merely on an extraordinary con- > 

 formation of tiie parts of the body. Of which this triple bladder, found in the 

 body of the late Mr. Booth, will be a proof. We have been told of a double 

 bladder found in the bodies of some men, as there was in the body of the 

 famous Casaubon; but no instance has yet been mentioned of three urinary 

 bladders in one person. 



This gentleman, in his best health, could not make urine in a full and con- 

 tinued stream, but running out by little and little, and with great efforts of 

 inspiration, especially when there was but a small quantity of it in the bladder, 

 which fatigued him very much, though the passing of tlie urine through the 

 neck of the bladder was not painful ; except in the last two or three years of his 

 life, because of a thick mucus, which was then discharged with the urine. 

 That mucus growing in greater quantity of late, made him apprehensive it had 

 been caused by a stone in the bladder; upon which he applied himself to one, 

 in order to be searched, who accordingly introducing his catheter, and meeting 

 with some resistance in the urethra, he forced the catheter through the mem- 

 branes, and made such dd.)ceration in them, that the patient immediately lost 

 a great quantity of blood ; which bleeding continuing for 10 days, without his 

 seeking any help, brought him under very great torments, by reason that the 

 blood was become grumous in the urethra, and could not be forced out, but by 

 very violent efforts and acute pain, which caused a mortification in the part, of 

 which he died. 



The day after his death I opened the body, in presence of Drs. Dawes, 

 Chamberlain, Woodward, Mr. Bernard, the surgeon, and several others ; in 

 which the natural urinary bladder was found lying on the left side of the pelvis 

 upon the ilium bone ; then searching what should be the cause of such unna- 

 tural situation, we found one large round bag lying under the pubis upon the 

 rectum, filling up all the cavity of the hypogastrium. Then in order to exa- 



VOL. IV. 4 A 



