Oven in Smiths Bible Dictionary
            The eastern oven is of two kinds --fixed and portable. The 
former is found only in towns, where regular bakers are 
employed. Ho 7:4 The latter ia adapted to the nomad state, it 
consists of a large jar made of clay, about three feet high 
and widening toward the bottom, with a hole for the extraction 
of the ashes. Each household possessed such an article, Ex 8:3 
and it was only in times of extreme dearth that the same oven 
sufficed for several families. Le 26:26 It was heated with dry 
twigs and grass, Mt 6:30 and the loaves were placed both 
inside and outside of it.
                          
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