424 On tlie Construction of KitcJien 



with heat, and prevent the kettle from boiling over. 

 These kettles should never be filled higher than to the 

 level of the lower part of this cylindrical space, otherwise 

 there will be danger of their boiling over.* 



It will be observed that the cover of this tea-kettle 

 projects a little beyond the cylindrical opening to which 

 it belongs. This projection serves instead of a handle 

 in removing and replacing the cover. The cover of 

 a tea-kettle is usually furnished with a knob for that 

 purpose; but these knobs are in the way when the 

 kettle is lifted up by its handle, unless the handle be 

 made much higher than otherwise would be suffi- 

 cient. 



It has, no doubt, already been remarked by the reader 

 that all the tea-kettles here recommended are of forms 

 that are perfectly easy to be executed in tin. There are 

 several reasons which have induced me to give a decided 

 preference to that material for constructing culinary 

 utensils. It is not only wholesome, which copper is 

 not, but it is also very cheap, and easy to be procured 

 in all places, and it is easily worked. It is moreover light 

 and strong, and not liable to be injured by accidents; and 

 if measures be taken to prevent the effects of rust it is 

 very durable. 



The four tea-kettles represented in the four last 

 figures are all particularly designed to be used with 

 the portable furnaces described in the last chapter; 

 and for that purpose they are well calculated, although 

 they are not suspended in cylinders. They may like- 

 wise be used with the register kitchen stoves described 



* I find, by experiments made since the above was written, that tea-kettles 

 of this kind should never be filled above two thirds full, otherwise they will be 

 very apt to boil over. 



