Of the Excellent Qualities of Coffee. 643 



d is the reservoir for receiving the coffee which 

 descends into it from the strainer; and 



e is the spout through which the coffee is poured out. 



f is the boiler, into which a small quantity, of water 

 is put, for the sole purpose of generating steam for 

 keeping the reservoir hot. 



g is the opening by which the water is poured into 

 the boiler or out of it : this opening has a flat cover, 

 which moves on a hinge that is represented in the 

 figure. 



The boiler is of a conical form, and is enlarged a 

 little at its upper extremity, in order to receive the cover 

 which closes it above. 



The reservoir and the boiler are fixed together above 

 by soldering, so that the reservoir remains suspended 

 in the boiler. 



The cylindrical strainer is suspended on the upper 

 extremity of the reservoir by means of a flat projecting 

 brim, about two tenths of an inch broad. 



h is the hoop, made of sheet copper, and perforated 

 with a row of holes, on which the boiler reposes : a 

 part of the bottom of the boiler is seen through these 

 holes. 



The reservoir is represented by dotted lines, in order 

 the better to distinguish it. 



The opening in the side of the boiler, by which 

 the water enters it, is represented in the figure. This 

 opening is covered by a part of the handle of the 

 coffee-pot. 



The diameter of the hoop k, on which the coffee-pot 

 stands, should always be at least six inches in diameter, 

 whatever may be the contents of the coffee-pot; and 

 the spirit lamps or portable furnaces used with these 



