<Tr> <Td_colspan="2"> Aerial photo of the NIH Mark O. Hatfield Clinical Research Center, Bethesda, Maryland </Td> </Tr> <Tr> <Th_colspan="2"> Agency overview </Th> </Tr> <Tr> <Th> Formed </Th> <Td> 1887 (1887) </Td> </Tr> <Tr> <Th> Preceding agency </Th> <Td> <Ul> <Li> Hygienic Laboratory </Li> </Ul> </Td> </Tr>

When was the national institute of health established