The Apothecary system of units was used in Britain and the US until 1858. Given the density of water is approximately 28000g/ft^3 and the relationships below, show all you work in calculating the density in apothecary pounds per pint. In the Apothecary system of units, gallons, quarts and pints are equivalent to those in the English system of units. 1 grain = 0.0.065 g, 20 grains = 1 scruple, 3 scruples = 1 dram, 8 drams = 1 apothecary ounce, 12 apothecary ounces = 1 apothecary pound.