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 lbs. avoirdupois, and being at the tempera- 

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

 utes) with the combustion of 346|- lbs. of coal, which 

 gives rather less than 6\ lbs. of water to each pound of 

 coal consumed, the water being heated 157 degrees, 

 or from 55° to 212°. 



According to my experiments, 20 lbs. 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 lb. of pine- 

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

 w^ould heat 23 lbs. 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 lb. of coal ought to make 40I lbs. of water, at the 

 temperature of 55°, boil. 



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

 consumed in making 6|- lbs. of water boil. Consequently, 

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



