[ 557 ] 
But if the Man who makes ufe of this Contrivance 
happens to be of a more than commonly fleepy Difpo- 
fition, in fuch Cafe anotherThread is tied to that Part of 
the Line CC which is next the Pulley, and its other 
End is twifted round theThumborWrift of the fleepy 
Perfon, whereby, when the Candle burns the Line, 
and the Weight falls, he receives fuch a fudden Pull 
as can hardly fail to wake him, as the Drawing will 
ealily explain. 
If the Line for a few Inches on each Side the 
Candle be Wire, with a fhort Thread only juft in the 
Middle where the Candle is placed, there can be 
no Danger of doing Mifchief by the Fire’s running 
along the Line. 
And thus may the pooreft Mechanic provide him- 
felf with an ufeful Servant at a very fmall Expence. 
Dec. io. 1745* 
XV. An Account of fome human Bones in- 
cruft ed with Stone, now in the Villa Ludo- 
vifia at Rome : communicated to the Royal 
Society by the Prefident, with a Drawing 
of the fame. 
"Read Dec. 12.QI OMETHING like the Body of a petri- 
*745- fled Man being mentioned by feveral 
Authors, as preferved in the Villa Ludovifia at Rome , 
and the fame having been lately referred to in 
a Difcourfe read before this Society ? I thought, 
that a Drawing of that Curiofity, which I procured 
at Rome fome Years fince, might, poflibly deierve 
