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ACROSS
1)  scottish chemist noted for his research into the structure of nucleic acids (born in 1907)
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 ____ing at which a number of athletic contests are held
4)  a sodium salt of carbonic acid; used in making soap powders and glass and paper


DOWN
1)  an antacid
2)  chocolate cookie with white cream filling
3)  a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it
4)  a collection of facts from which conclusions may be drawn

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