1  2  3  4 

1  _  _  _  _

2  _  _  _  _

3  _  _  _  _

4  _  _  _  _


ACROSS
1)  a plug used to close a hole in a barrel or flask
2)  a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood
3)  (greek mythology) a queen of sparta who was raped by zeus who had taken the form of a swan; helen of troy was conceived in the rape of ____
4)  the temporal end; the concluding time


DOWN
1)  a statute in draft before it becomes law
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  a sign of assent or salutation or command
4)  any of various small biting flies: midges; biting midges; black flies; sand flies

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