PROPAGATION 
They are, as a rule, made very much like 
the old-style, round-cannon, cast-iron, soft- 
coal heater, only they are made very much 
smaller. Some of them have a body large 
enough to hold hard coal enough to burn 
twenty-four hours, and others have a 
smaller body and are provided with a 
magazine for holding most of the coal, 
which is fed down to the fire-pot as fast 
as it is needed to keep the fire burning 
steadily, something on the principle of 
the magazine in an ordinary base-burner. 
These magazines should hold coal enough 
to last from twelve to twenty-four hours. 
The stoves are provided with a regulator 
which is operated by a thermostat that is 
located near the floor under the hover; 
the thermostat is far enough from the 
stove so that all the space under the 
hover will warm up nicely before it ex- 
‘pands enough to operate the regulator 
which controls the draft of the stove and 
the temperature of the hover. They are 
also provided with a thermometer made 
especially for them; they are provided 
with a hover that deflects the heat from 
the stove down onto the floor where the 
chickens hover; this hover is, as a 
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