as a Vehicle for transporting Heat. 339 



three boilers may be used for cooking, either with a fire 

 made under it, or with steam brought into it from the 

 neighbouring steam-boiler. 



The object I had principally in view in this arrange- 

 ment was to show, in the most striking and convincing 

 manner, that all the different processes of cookery 

 which are performed by boiling, such as boiling meat 

 and vegetables in boiling water, making soups, stew- 

 ing, etc., may in all cases be performed quite as well, 

 and in many much better, by heating the liquid which 

 is to be boiled, and keeping it boiling, by admitting hot 

 steam into it, than by making a fire under it. 



By using one of these boilers alternately in these two 

 ways, on different days, in preparing the same kind of 

 food, I concluded that all doubts on this subject would 

 be most effectually removed. 



To exhibit in a manner still more striking the appli- 

 cation of steam to the boiling of liquids for culinary 

 purposes, the following arrangement has been made and 

 completed. A horizontal steam-conductor (concealed 

 in a square wooden tube), communicating at right angles 

 with the steam-conductor before described, passes, just 

 below the ceiling, from the middle of one side of the 

 room to the middle of the ceiling, and ends in a ves- 

 sel in the form of a flat drum, about 10 inches in diame- 

 ter and 5 inches high, which is attached to the ceiling 

 perpendicularly over the centre of a large table which 

 is placed in the middle of the room. 



On the outside of this drum, or short hollow cylinder 

 (which is made of tin and covered with wood, to con- 

 fine the heat), there are, at equal distances, four project- 

 ing horizontal tubes, each about i inch in diameter 

 and 2 inches long, which communicate with the inside 



