892 Lord mahon’s Method of 
On the 26th of September laft year I had the honour 
to repeat fome of my experiments before the Prefident 
and fome of the Fellows of the Royal Society, the Lord 
Mayor and Aldermen of the City of London, the Com- 
mittee of City Lands, feveral of the foreign minifters, 
and a great number of other perfons. 
§ 1 8. The firft experiment was to fill the lower room 
of the building (which room was about twenty-fix feet 
long by fixteen wide) full of fhavings and faggots, mixed 
with combuftibles, and to fet them all on fire. The heat 
w r as fo intenfe, that the glafs of the windows was melted 
like fo much common fealing wax, and run down in 
drops, yet the flooring boards of that very room were 
not burnt through, nor was one of the fide timbers, 
floor-joifts, or cieling-joifts, damaged in the fmalleft de- 
gree; and the perfons who went into the room imme- 
diately over the room filled with fire, did not perceive 
any ill effedls from it whatever, even the floor of that 
room being perfectly cool during that enormous confla- 
gration immediately underneath. 
§19.1 then caufed a kind of wooden building (of full 
fifty feet in length, and of three ftories high in the mid- 
dle) to be ereited, quite clofe to one end of the fecured 
wooden houfe. I filled and covered this building with 
above eleven hundred large kiln faggots, and feveral 
loads of dry fhavings; and I fet this pile on fire. 
3 
The 
