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 



