C V 6 1 
roundifh, and have in their Centres the Seeds of a 
fort of Acacia, which had attra&ed, or was coated 
over by that Subftance, efteem’d a great Cordial or 
Alexipharmac 5 while others are long, and are gather'd 
in Layers or Coats upon the Stalks of Vegetables. 
And I have one form'd round the Stone of that great 
Plum, which comes pickled from thence, and is called 
Mango . 
As to the Afperities or Prickles on the Rays, they 
are taken notice of, fo long fince as the Time of 
Cornelius Celfus, who, Lib . VII. c. 26. calls them 
Calculi Spinofi . 
It may feem very ftrange and paradoxical, what I 
can affure your Lordfhip is true, that the fewer the 
Knobs, Afperities or Prickles are on the Surface of 
Calculi, the more troublefome they are to the Per- 
fons in whofe Bladders they lie. Dr. Hickes , a very 
learned Divine here, and defervedly famous for 
his Knowledge in Antiquities and the Northern Lam 
guages, was the mod tormented with the Stone in his 
Bladder of any I ever knew, efpecially upon any Mo- 
tion. He would not fubmit to be cut for the Diftem- 
per, upon the account of his Age, and many other 
Reafons 5 but order’d his Executors, that he fhould be 
open’d after Death, and the Stone taken out of his 
Bladder, put into afdverBox, and given tome, who 
had been his Phyfician for many Years, to place it in 
my Colleftion of fuch kind of Curiofities. What is 
very particular in this Stone, is, that the Protuberances 
and Prickles upon it were few, and at a Diftance from 
each other. Every one of them had made a Hole in 
his Bladder, like a Sheath or Socket s and when, up- 
on Motion, they were removed out of their corre- 
fponding 
