£ 268 ] 
VII. A Leter from W. Watfon, F. R. S. to 
Francis Wollafton, Ff quire , F.R.S. concern- 
ing a large Stone found in the Stomach of 
jz Horfe . 
S 1 R 9 
Read Jan. Hereby do myfelf the Pleafure of fend- 
/44 ' JL ’ n S y°u a few Obfervations upon the 
Calculus you favour'd me with the Examination of. 
You inform'd me, that it was found in the Stomach 
of a Coach-Horfe in July laft; and that it then 
weigh'd 3 Pounds two Ounces and half Averdupois . 
You likewife mentioned, that the poor Creature was 
obferved frequently to be in violent Pain ; and would 
fometimes eagerly turn his Head to one of his Sides, 
and fometimes to the other, as though he endea- 
voured to bite out that which annoyed him ; and that 
he died, after having taken various Remedies, which 
the Farriers adminifter’d. When I weighed this Stone 
about ten Days ago, its Weight was l Pounds and 
3 Qu alters of an Ounce ; fo that, in about half a 
Year, it had loft i Pound i Ounce and 7 Eighths. 
The Figure of it is fpheroidal, as thefe Sort of Stones 
generally are ; its Periphery 17 Inches and i, by 16 
Inches and half; which are very near the Tame Di- 
menfions this Stone had when firft found. The Sur- 
face of it irregular, fomewhat refembiing the Ine- 
qualities obferved upon the Surface of the Brain 5 all 
the projecting Parts of which are polifhed, from their 
Friftion againft the Sides of the Stomach. It is of 
a, dark-brown bilious Colour, and very like to a 
Species 
