266 THE WALTONIAN CASE. 



glass let into a zinc bedding, and with a ring by which to 

 lift them. This plan allows them to be shifted, to give air 

 to any extent necessary. Having removed these, we find 

 the pots standing on clear, damp sand. When the pots are 

 removed it is an easy matter to lift out the whole of the 

 heating apparatus, by means of the two handles attached to 

 the zinc tray, and its appearance is that in Figure 2. 



FIG. 2. 



The upper tray B B is an inch deep, and in this, sand an 

 inch deep is carefully spread over. Attached to it is the 

 boiler A, which is in reality double, one portion enabling 

 the hot air and the smoke of the lamp to circulate round 

 the tank, and escape by means of the flue D, to which the 

 funnel E is attached when in operation. The tank itself 

 being filled by means of the vapor tube C, on which a cap 

 fits to prevent any excessive escape of steam. The boiler 

 holds about two quarts of water. 



If we turn the tray upside down, we have the appearance 

 presented by Figure 3, where F is the boiler, and G the 



