On the Use of Steam Heat. 793 



by the tube which serves to conduct the water from the 

 stove into the boiler ; and the valve by which it escapes 

 into the atmosphere, being situated near the boiler, may 

 open into a canal or a tube communicating with the 

 chimney of the boiler fire-place. Then if, by the care- 

 lessness of the person having charge of the stove, there 

 is too much steam, since it will follow the same road, it 

 will escape by the chimney without diffusing itself into 

 the apartment. 



7th. The tube which carries the water resulting from 

 the condensation of the steam in the stove back into 

 the boiler must pass through the walls or cover of the 

 boiler, and descend within it nearly to the bottom ; and 

 the extremity, being always beneath the water in the 

 boiler, should be bent and turned upwards. All these 

 precautions are necessary to prevent the steam in the 

 boiler from ever finding its way into this tube. 



8th. The steam-tube which communicates with the 

 highest part of the stove should start from the highest 

 part of the boiler, and this tube, as well as that which 

 carries the w^ater back from the stove to the boiler, 

 should be well surrounded by suitable coverings, in 

 order to preserve their heat. The boiler should also 

 be well covered above and on every side, so as to pro- 

 tect it from the cold. 



9th. Although the expenditure of water in this appa- 

 ratus is almost nothing when the fire is properly regu- 

 lated, so that when the boiler has been filled at the 

 beginning of the autumn there is no need of touching 

 it during the winter, or indeed for several years, — never- 

 theless, as it might easily happen that the fire should be 

 driven too much, owing to carelessness, from time to 

 time, so as to drive out part of the water in the form 



