164 SORTS OF FUEL FOR FIRE HEAT. 



become moderate, the pots should be plunged 

 therein; or should occasion require the intro- 

 duction of the plants before the violent heat has 

 sufficiently subsided, they may be plunged only 

 a little or half way, according to the temperature 

 of the bed, and plunged after to the rims, when 

 the heat is proper. 



SORTS OF FUEL FOR FIRE HEAT. 



Par. 9. The different sorts of fuel will greatly 

 depend on the situation, but when convenient, 

 coals and coal cinders, or coke, are to be pre- 

 ferred, making the most regular and durable 

 fires, requiring less trouble in the management, 

 and the house kept in a steady and proper degree 

 of heat, with less attention than most other sorts 

 of fuel require ; but in those places where the 

 above are scarce, wood, peat, &c. may be sub- 

 stituted. Also at the large tanners they make 

 bark peat from the waste of old tan, which may 

 be used with tolerable good effect. 



REGULATION OF HEAT, THERMOMETER, &C. 



Par. 10. As the regulation of heat is one of 



