Assertion: brattice | /r/HasProperty | required by the rules of the colliery
Facets:
Source sentences:
text: It was a sound and natural conclusion to draw from these facts that the brattice had been down, that gas had accumulated in consequence; that as no one had been working in the place for some time, it had not been examined daily by the fireman, as required by the rules of the colliery ; and that the gas was not known of by him, and that it was ignited either in one or other of the two modes herein described.