on Cooking for the Poor. 547 



It would be hardly possible to invent a more nourish- 

 ing or more palatable kind of food than calecannon, as 

 it is made in Ireland ; but the expense of it might be 

 considerably diminished by using less butter in pre- 

 paring it. 



Salted herrings (which do not in general cost much 

 more than a penny the pound) might be used with great 

 advantage to give it a relish, particularly when a small 

 proportion of butter is used. 



In this experiment, 273 gallons of water, weighing 

 about 2224 Ibs. avoirdupois, and being at the tempera- 

 ture of 55, was made to boil (in 2 hours and 32 min- 

 utes) with the combustion of 3463- Ibs. of coal, which 

 gives rather less than 6} Ibs. of water to each pound of 

 coal consumed, the water being heated 157 degrees, 

 or from 55 to 212. 



According to my experiments, 20 Ibs. of water may 

 be heated 180 degrees (namely, from 32, the freezing- 

 point, to 212, the temperature of boiling water) with 

 the heat generated in the combustion of i Ib. of pine- 

 wood. Consequently, the same quantity of wood (i Ib.) 

 would heat 23 Ibs. of water 157 degrees, or from 55 

 to 212. 



But M. Lavoisier has shown us by his experiments 

 that the quantity of heat generated in the combustion 

 of any given weight of coal is greater than that gen- 

 erated in the combustion of the same weight of dry 

 wood, in the proportion of 1089 to 600. Consequently, 

 i Ib. of coal ought to make 40$ Ibs. of water, at the 

 temperature of 55, boil. 



But, in the foregoing experiments, i Ib. of coal was 

 consumed in making 6} Ibs. of water boil. Consequently, 

 more than f of the heat generated, or which might with 



