^3^ ^f ^'^^ Excellent Qualities of Coffee. 



the quantity of water necessary for making one cup of 

 coffee is 8^ cubic inches. 



A Table, showing the Diameters and Heights of the cylindrical Vessels (or 

 Strainers) to be used in making the following Quantities of Coffee : — 



As there is so Httle difference in the heights of 

 these strainers, and as a small additional height will 

 be rather advantageous than otherwise, I would recom- 

 mend them to be made all of the same height; viz., 

 5|- inches in height. 



As these strainers must be suspended in their reser- 

 voirs which are destined for receiving the coffee, and 

 at such a height that after all the coffee has passed 

 through the strainer the bottom of the strainer may 

 still be above the surface of the coffee in the reservoir, 

 it will be best to make the reservoir of a conical form, 

 and just large enough above to receive the strainer in 

 such a manner that it may be suspended in the reser- 

 voir by means of a narrow projecting brim. 



The boiler in which the reservoir is suspended may 

 likewise be made conical, and of such diameter above 

 as to receive the reservoir in such a manner as to be 

 firmly united to it. 



The reservoir and its boiler must be soldered to- 

 gether above at their brims, and the reservoir must be 

 suspended in its boiler in such a manner that its bot- 



