2 34 
Some part of it being, by frequent handling, rubb’d away. 
The Surface rough, unequal, -divided into feveral lit- 
tle Rifings, each about the fize of half a Vetch, or fome- 
what lefs. 
You have in Fig. 7. Y. Z. The Proportions exa&Iy drawn. 
The many ftrong annular Fibres, which appear not only 
at the ©rifice, where the Duffus communis opens into the 
Duodenum } but alfo all along the oblique paflage, of that 
Duff us, betweeen the Coats of the Inteftine, (which paf- 
fage is, according to Dr Glijfons meafure, about half an 
inch in length) do, by way of Sphin&er, keep this end 
of the Duff us communis very ftrait and clofe. And be- 
sides this ftraitnefs of the Duffus , the two Oblique In- 
fertions, it makes at feme diftanee from one another, thro* 
the two outer Coats of the- Duodenum, render it yet more 
difficult, for a fubftance of any Bulk, ropafs this way. So 
that, however great Stones may be-generated in the Gall- 
Bladder, Duffus Cjifticus, Hepaticus , or Communis , it is not 
eafy to conceive, How a Stone of the Magnitude here de- 
fcrib’d, could poffibly, -through a paffage of itfelf fo very 
narrow, ftrait, and difficult, be conveyed into the Duo- 
denum. 
From thefe Confiderations, I was extreamly defirous to 
hear, what could befaid, toProye,That this Stone was not 
form’d in the Fifiula alimentaris , but (large, as now it is) 
came this, way into it. In anfwer to which Inquiry, the 
Gentleman was pleas'd to let me know, 
That, before the Di/charge of this Stone , He had the 
Jaundice -^ which came fuddenly on him, and continued 
feveral months, in a fsvere, and moft exceffive manner. 
That this Jaundice, beiide the difcolouring of his Urine 
and- Skin, to a very great degree 5 befide Lofs of Appetite, 
Faintnefs, and many other Symptoms, ufual in this Di- 
ftemper $ was alfo accompaayed with a Pain (in, or) near 
the Stomach. 
That 
