| http://www.w3.org/ns/prov#value | - 'A is the shell of my boiler, which is more especially intended to be used for that class of engines employed in threshing and other field work where there is straw or other light material enough for fuel, but which has never been satisfactorily burned without an artificial draft or blast, and which has always been danagerous by reason of the sparks thrown out, on account of incomplete combustion.
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