<Tr> <Td_colspan="3"> Most common measures shown in italic font <P> Exact conversions in bold font </P> </Td> </Tr> <P> Exact conversions in bold font </P> <Tr> <Th> Unit </Th> <Th> Divisions </Th> <Th> SI equivalent </Th> </Tr> <Tr> <Td> 1 minim (min) </Td> <Td> ~ 1 drop or 0.95 grain of water </Td> <Td> 6992616115199218750 ♠ 61.611 519 921 875 μL </Td> </Tr>

When did the us adopt the imperial system