36 APPENDIX 
_ ed by the ftack from the cold winds, _ This funnel, which 
came from the ground floor, and had_a confiderable height 
above the roof, was conftantly in a ftrong drawing ftate 
_ day and night, winter and fummer. ° 
Blacking of funnels expofed to the fun, would probably 
make them draw ftill ftronger, 
In Paris I faw a fire-place fo ingenioufly contrived as to 
ferve conveniently two rooms, a bedchamber and a ftudy. 
The funnel over the fire was round. The fire-place was 
of caft iron, having an upright back A, and two ho- 
rizontal femicircular plates B C, the whole fo order- 
ed as to turn on the pivots DE. The plate B al- 
avays {topped that part of the round funnel that was next 
to the room without fire, while the other half of the fun- 
mel over the fire was always open. By this means a fervant 
im the morning could make a fire on the hearth G, then in 
the fludy, without difturbing the mafter by going into his 
chamber; and the mafter when he-refe, could with a touch 
of his foot turn the chimney on its pivots, and bring the 
fire into his chamber, keep it there as long as he wanted 
it, and turn it again when he went out into his ftudy. . The 
room which had no fire in it, was alfo warmed by the heat 
coming through the back plate, and fpreading in the room 
,as it could not go up the chimney. 
Plate I. 
Figure 13. 
Explenation 
ee ee ee oe 
