1  2  3  4 

1  _  _  _  _

2  _  _  _  _

3  _  _  _  _

4  _  _  _  _


ACROSS
1)  united states virologist who developed the ____ vaccine that is injected against poliomyelitis (born 1914)
2)  english architect who designed more than fifty london churches (1632-1723)
3)  an inflammatory disease involving the sebaceous glands of the skin; characterized by papules or pustules or comedones
4)  the process whereby heat changes something from a solid to a liquid


DOWN
1)  a sharp blow
2)  a curved shape in the vertical plane that spans an opening
3)  a russian river in siberia; flows northward into the laptev sea
4)  be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about

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salk
wren
acne
thaw