A grain is a unit of measurement in medicine. A one half grain equals 30 mgs as part of the apothecaries system
16.1997275 milligrams
Two lots of one-fourths equals a half.
One half a century equals 50 years as a century equals 100 years.
one and a half feet
1 grain= 60 mg
One grain of morphine equals about 60 milligrams
12
12
2
one half
2
It is 54 inches.