20 PHILOSOl'HICAL TRANSACTIONS. [aNNO 1683-4. 



transmitted. — To inquire into the nature of nephritic medicines. — To examine 

 lithontriptics, so as to exclude those from that class and character, which have 

 no relative virtue that way : and to lessen the catalogue of those mistaken 

 specifics. — ^To inquire into the nature of the hop, which is so much and perhaps 

 innocently condemned for its aptness to generate the stone. — To explain the 

 manner of the operations of some medicines, which though they are not li- 

 thontriptics, yet may be good nephritics. 



A Postscript to the Editor, containing a short Account of two Human Calculi, 

 of unusual Form and Size, from the same F. S. M. D. — I here send you the 

 figure of a stone, fig. 1, pi. 1, of a prodigious size, and as rare a shape, some- 

 what resembling indeed the kidney, for that was quite worn away, and this 

 stone filled up the place. It weighed somewhat more when taken out of the 

 body, than it does now, for it then weighed 7 ounces and a half. There is no 

 account of a stone generated in the kidney that nearly equals this. Without 

 breaking it asunder, I can find it consists of several laminae laid over each other, 

 as that of the bladder does: the circumference measures 7 inches. 



That taken out of the body of the late Duke of Norfolk's father, fig. 2, was 

 brought not long since to the Royal Society, by Sir Theodore de Vaux, which 

 is branched, and seems to have spread some branches into great vessels, whether 

 arteries, veins, or into the ureter, I cannot determine, though these as well as 

 the pelvis seem to have been filled up by this large stone : yet this comes far 

 short of that before-mentioned, since it weighs but 4 ounces and a half: a 

 stone indeed of an incredible size to be found in the kidney. The measure 

 lengthwise, from one extreme to the other, was 4 inches ; the extension of the 

 branches, from one to the other, measured crosswise or transversely 3-1- inches. 



Account of a Spot seen in the Sun from the 15th of April to the 8th of Mat/, 

 l684; with the Line of its Course predicted, if it make a second Return. By 

 J. Flamsteed, Astron. Reg. N° 157, P- 535. 



April 25, as I was measuring the distance of the planet 9 from the sun, 

 about an hour before noon, I discovered a large spot entered within his disk, a 

 little distant from his following limb. These appearances, however frequent in 

 the days of Scheiner and Galileo, have been so rare of late, that this is the 

 only one I have seen in the sun's face since December 1676. Wherefore I 

 thought an account of it might not be unacceptable. By the observed meri- 

 dional distances of it and the sun's southern limb, from the vertex at noon, I 

 found it to have 3' 40' more north declination than the sun's centre, and at 3h. 

 35 m. afternoon I measured its distance from his next limb, 40". 



